CNC material selection samples including polycarbonate ABS 6061 aluminum engineering plastics and inspection evidence for RFQ review
CNC Materials Metals & Plastics MTC / CoC / FAI

CNC Material Selection Guide: Polycarbonate, ABS, 6061 Aluminum and Quality Evidence

Choose CNC metals and engineering plastics by comparing load, environment, machinability, finish impact, CTQ fits, grade equivalents, and inspection evidence before RFQ. This guide helps engineers and buyers shortlist materials such as polycarbonate, ABS, nylon, 6061 aluminum, stainless steel, brass, and POM while checking the documents needed for material approval.

Quick Answer: How should engineers choose CNC materials?

CNC material selection should start with the part function, load condition, chemical or corrosion exposure, required finish, tolerance stack, and available quality evidence. Material grade equivalents should be treated as sourcing references, not automatic substitutes. MTC, CoC, FAI, CMM reports, and finish inspection should be requested where required by the drawing, CTQ features, or customer approval process.

Polycarbonate / ABS / Nylon 6061 Aluminum / Stainless / Brass Grade Equivalent Review MTC / CoC / FAI Evidence

Need specialized guidance? Review CNC surface finishing effects on fit and appearance, check tolerance feasibility for CNC material and feature selection, or verify quality documents and inspection support.

When to Use This CNC Material Selection Guide

Use this guide when material choice affects RFQ risk

  • Early-stage shortlisting of CNC metals and engineering plastics such as polycarbonate, ABS, nylon, 6061 aluminum, stainless steel, brass, and POM before RFQ release or drawing approval.
  • Comparing metals and plastics when strength, stiffness, weight, wear behavior, moisture absorption, thermal expansion, or machinability may affect final part performance.
  • Reviewing grade equivalents for ASTM, JIS, EN, GB, or supplier-proposed substitute materials before approving any alternate grade on the drawing, PO, or inspection plan.
  • Checking finish impact on CTQ fits, including how anodize, electroless nickel, plating, coating, or passivation may affect bores, threads, mating faces, and post-finish inspection results.
  • Defining quality evidence before RFQ, including MTC, CoC, FAI, CMM report, finish certificate, or CTQ-based dimensional inspection where required by the drawing or customer approval process.

Use another guide when the material question is process-specific

  • Resin-specific material selection for injection molding should be reviewed in the injection molding resin selection guide.
  • Molding shrinkage, warpage, flow behavior, or resin processing limits should be checked in the injection molding material properties and resin behavior guide.
  • Mold steel selection, surface treatment, or tool-life review should be separated from CNC part material selection and reviewed in the mold steel and surface treatment guide.
  • Plating process development, such as bath chemistry, deposition rate, masking strategy, or coating parameter tuning, should be handled by the finish supplier or process owner.
  • Single-material deep studies such as a dedicated polycarbonate, ABS, 6061 aluminum, or POM Delrin technical page may be better when the project needs grade-specific data rather than cross-material shortlisting.

How to Shortlist CNC Materials in 5 Engineering Questions Before RFQ

How do engineers and buyers shortlist CNC materials?

CNC material shortlisting works best when requirements are reviewed in a fixed sequence: load and stiffness, service environment, post-finish tolerance, weight or conductivity, and required quality evidence. This helps narrow choices such as polycarbonate, ABS, nylon, 6061 aluminum, stainless steel, brass, and POM to a realistic shortlist before quotation, drawing approval, or CNC material and finish DFM review.

Decision Question Why It Matters What It Eliminates What It Usually Leaves
1. What load, stiffness, or wear condition does the part see? Defines whether the part needs metal strength, plastic insulation, wear resistance, dimensional stability, or a balance of stiffness and weight. Materials that cannot meet the required load case, wear condition, deflection limit, or assembly function. Candidates such as 6061 aluminum, 7075 aluminum, stainless steel, brass, POM, nylon, polycarbonate, ABS, or PEEK depending on the drawing and application.
2. What temperature, chemical, humidity, or corrosion exposure will it face? Service environment affects corrosion risk, moisture absorption, chemical compatibility, thermal expansion, UV exposure, and long-term fit stability. Materials that may lose dimensional stability, corrode, absorb moisture, soften, crack, or fail the service environment after machining or finishing. Suitable metals, engineering plastics, or finished-condition options that remain compatible with the required environment and customer specification.
3. What tolerance or CTQ fit matters after finishing? Finishes such as anodize, electroless nickel, plating, coating, or passivation may affect bores, threads, mating faces, and other fit-critical features. Material and finish combinations that cannot maintain the required post-finish fit, thread engagement, or dimensional stability. Materials and finishes verified by a tolerance feasibility review for CNC material and CTQ fits before drawing release.
4. Does weight, conductivity, insulation, or appearance matter? Weight, electrical behavior, thermal conductivity, insulation, and visible appearance can move the shortlist toward different metals or engineering plastics. Dense metals when weight is critical, non-conductive plastics when conductivity is required, or visually unstable materials when appearance is customer-facing. Options such as 6061 aluminum for lightweight machined parts, brass or copper for conductivity, polycarbonate or ABS for plastic components, or stainless steel where corrosion resistance is required.
5. What material and inspection documents are required? Documentation confirms grade, lot traceability, finish condition, conformance, and inspection evidence before procurement approval or customer review. Undocumented commercial stock, unapproved substitute grades, or material lots without traceable evidence where the project requires verification. Documented material and inspection records supported by quality documents and inspection support:
  • MTC Where Required
  • CoC Where Required
  • FAI Where Required
  • Material Traceability
  • CMM Report for CTQs
  • Finish Inspection Evidence

Quick CNC Material Selection Matrix for Metals and Engineering Plastics

Material Family
Best Use
Main Risk
Finish Impact
Evidence to Request

Aluminum Alloys

6061, 7075, 5052, 2024
Lightweight housings, brackets, plates, fixtures, visible machined parts, and components where strength-to-weight ratio or anodized appearance matters.
Softer grades may show thread wear, denting, or insert retention risk; higher-strength grades may increase cost, tool wear, or procurement constraints if over-specified.
Anodize, hard anodize, conversion coating, or plating may affect bores, threads, sealing faces, and other CTQ fits that must be checked after finishing.
Confirm alloy grade, temper, finish callout, substitute boundary, and post-finish inspection plan through a tolerance feasibility review for aluminum CNC parts. Request MTC, finish evidence, and CTQ inspection where required by the drawing or PO.

Stainless Steels

303, 304L, 316L, 17-4 PH
Corrosion-sensitive components, washdown hardware, shafts, housings, fastener-related parts, and machined components requiring strength plus corrosion resistance.
Machining cost, tool wear, burr formation, work hardening, magnetism after cold work, and grade substitution risk can affect part cost and approval.
Passivation, electropolishing, blasting, or surface cleaning should be reviewed against corrosion expectations, appearance requirements, and CTQ surface conditions.
Confirm grade, heat lot, product form, corrosion requirement, and inspection scope. Review quality documents and inspection support. Request MTC, CoC, PMI, or heat-lot traceability only where the project requires verification.

Brass and Copper Alloys

C360, C3604, C110, beryllium copper
Electrical hardware, conductive components, RF shielding parts, bushings, connectors, heat-transfer parts, and high-machinability precision features.
Surface oxidation, burrs on fine edges, grade purity differences, conductivity mismatch, and plating or tarnish-control requirements can affect performance.
Nickel, silver, gold, tin, or other functional plating may be required for conductivity, solderability, wear, or tarnish resistance depending on the drawing.
Confirm alloy grade, conductivity target, plating requirement, storage condition, and incoming material evidence before approving substitutes. Request material certificate, conductivity evidence, and plating certificate where specified by the drawing or customer requirement.

Engineering Plastics

Polycarbonate, ABS, nylon, POM, PEEK
Insulators, lightweight covers, wear pads, clear or impact-resistant parts, prototypes, medical or electronics components, and metal-replacement parts where stiffness and environment allow.
Moisture absorption, thermal expansion, creep, stress cracking, poor datum stability, and edge deformation can affect tight CNC tolerances or assembly fit.
Machined plastics may show tool marks, burrs, surface whitening, dimensional movement, or moisture-related drift depending on material grade and service environment.
Confirm resin grade, sheet or rod source, moisture condition, annealing need, tolerance requirement, and service environment. Use the injection molding material properties guide only when the project may transition to molding. Request resin grade evidence and dimensional stability review where CTQ fits depend on plastic behavior.

Key CNC Material Trade-offs and Supplier Validation Checks

Strength-to-weight trade-offs in aluminum and engineering plastics

Impact on Procurement Selecting a higher-strength material such as 7075 aluminum for a low-load part may increase raw material cost, machining time, tool wear, and sourcing constraints without improving the functional outcome. For lightweight plastic parts, polycarbonate, ABS, nylon, or POM should be compared against load, stiffness, impact behavior, and dimensional stability rather than cost alone.
Supplier Verification Confirm material grade, temper or resin grade, substitute boundaries, and required evidence through quality documents and inspection support where the drawing or PO requires MTC, CoC, FAI, or CTQ inspection.

Corrosion, chemical exposure, and service environment limits

Impact on Material Choice Corrosion exposure, cleaning chemicals, humidity, UV, temperature, and contact with dissimilar metals can change the shortlist. Stainless steel, aluminum with protective finish, brass, copper, polycarbonate, ABS, nylon, or POM may each behave differently depending on the service environment and post-finish condition.
Supplier Verification Review chemical compatibility, corrosion requirement, finish callout, and post-finish CTQ dimensions before sample approval through a tolerance feasibility review for material and finish selection.

Machinability, tool wear, burr risk, and CTQ consistency

Impact on Quality Material machinability affects dimensional repeatability, burr formation, edge condition, surface finish, and inspection stability across the lot. Stainless steel, titanium, glass-filled plastics, soft aluminum, and copper alloys may need different tooling, feeds, speeds, deburring methods, and inspection plans.
Supplier Verification Define CTQ dimensions, burr limits, edge-break requirements, inspection method, and sampling plan before RFQ when manual deburring or tool wear could affect bores, threads, mating faces, or assembly-critical features.

Plastic stability, cosmetic surfaces, and post-machining movement

Impact on Plastics Polycarbonate, ABS, nylon, POM, and PEEK can reduce weight or provide insulation, but some plastics may move after machining because of moisture absorption, thermal expansion, internal stress, creep, or fixture release. Large flat surfaces, thin walls, and tight datum relationships should be reviewed carefully.
Supplier Validation Confirm resin grade, stock form, moisture condition, annealing need where applicable, surface expectation, and final inspection method before first-article review. Use visual limit samples or approved boundary samples only when cosmetic acceptance must be defined.

Finish Impact on CNC Dimensions, Threads, and CTQ Fits

Post-finish inspection of anodized CNC machined part bores threads and CTQ fits for material and finish review
Post-finish dimensional review for bores, threads, and CTQ fits

Post-finish size change should be included in the tolerance stack for any fit-critical CNC feature. Assembly issues may occur when the machined size is acceptable before finishing, but anodize, electroless nickel, plating, coating, or passivation changes the final bore size, thread engagement, datum contact, or mating clearance.

Finish planning should be reviewed before RFQ for materials such as 6061 aluminum, 7075 aluminum, stainless steel, brass, copper, polycarbonate, ABS, nylon, and POM when the drawing includes CTQ fits or cosmetic surfaces. Review the CNC surface finishing guide for fit and appearance before locking the final finish callout.

How much does anodizing or electroless nickel change CNC part size?

Finish thickness depends on the finish specification, supplier process, masking plan, material, and inspection method. Anodize, hard anodize, and electroless nickel may change bores, threads, sealing features, and mating faces enough to affect CTQ fits. Do not rely on a generic thickness rule for precision parts; confirm the finish specification, machining allowance, masking requirement, and post-finish inspection method before RFQ or sample approval.

Finishing Type Thickness Basis OD / Surface Impact ID / Thread Impact Mitigation Strategy
Type II Anodize Confirm by finish specification May change external dimensions, color response, and visible surface acceptance May reduce bore clearance or tighten thread engagement depending on allowance Define pre-finish size, masking need, thread allowance, and finished-condition inspection
Hard Anodize / Type III Evidence Required for thickness and buildup May create larger dimensional shift and surface condition changes than decorative anodize Can affect precision bores, threads, sliding fits, and sealing features if not planned Review masking, post-finish honing, grinding, reaming, or tolerance relaxation where required
Electroless Nickel (EN) Confirm deposit thickness by supplier certificate Can add a controlled layer to external and recessed features depending on process control May reduce bore size and tighten thread fit on precision features Adjust machining offset, mask critical features, or inspect finished dimensions against CTQ requirements
Passivation / Cleaning Usually specification-driven Generally reviewed for corrosion performance, cleanliness, and surface condition rather than heavy buildup Usually lower dimensional buildup risk, but CTQ features still need finished-condition review Confirm corrosion requirement, cleanliness requirement, and inspection evidence where specified
CMM and gage inspection of finished CNC part after anodize or plating for bore thread and mating fit validation
Finished-condition inspection for CTQ bores, threads, and mating features

How anodizing and electroless nickel affect precision CNC features

Anodizing changes the aluminum surface and may affect both external and internal dimensions depending on the specification and process. Electroless nickel is an additive deposit and may create more uniform coverage than some line-of-sight coatings, including on recessed or complex features. For precision CNC parts, the buyer should not assume the final fit from the pre-finish machining size alone.

When masking, post-reaming, or honing should be reviewed

When the allowed tolerance is small compared with the expected finish effect, a tolerance feasibility review for finish impact on CNC fits should confirm whether bore masking, machining allowance, post-reaming, honing, grinding, or finished-condition inspection is needed. Evidence Required: any fixed tolerance threshold, such as ±0.01 mm, should come from the drawing, fit requirement, finish specification, and inspection plan.

Critical Inspection Logic for Procurement:

Finished parts should be verified with an inspection method appropriate to the feature, such as CMM for geometry, plug gages for bores, thread ring gages for threads, or visual criteria for appearance-critical surfaces. Tolerance agreements should reference the final post-finish condition and align with quality documents and inspection support before lot release where required.

CNC Material Grade Equivalents, Substitution Risk, and MTC Verification

Mill test certificate review for CNC material grade substitution approval including aluminum stainless steel brass and engineering plastic evidence
MTC review for CNC material grade and substitution evidence

Material grade equivalents are sourcing references, not automatic engineering approvals. ASTM, JIS, EN, GB, AISI, or supplier-proposed equivalents may appear similar by name or chemistry, but they can still differ in temper, product form, mechanical minimums, heat treatment, corrosion requirement, and inspection evidence. Buyers should verify the released drawing, PO, MTC, product form, finish condition, and customer approval boundary before accepting any substitute material.

Common Equivalent Reference What May Still Differ What Buyers Should Verify
6061 Aluminum vs. EN AW-6061 Temper, product form, plate or bar condition, chemistry range, mechanical values, anodize response, and supplier documentation. Verify temper, product form, mechanical test values, finish requirement, CTQ fit risk, and MTC against the released drawing and PO.
SUS304 vs. AISI 304 Stainless Steel Product condition, cold-work history, magnetic response, corrosion expectation, passivation requirement, and heat-lot documentation. Review MTC, heat lot, surface condition, corrosion exposure, passivation note, and PMI requirement where the project requires material confirmation.
Q235 vs. ASTM A36 Carbon Steel Yield strength threshold, chemistry limits, product form, weldability assumptions, finish requirement, and local sourcing documentation. Confirm heat or lot traceability, reported mechanical values, product form, finish callout, and drawing approval before accepting substitution.
Polycarbonate, ABS, Nylon, or POM Grade Substitution Resin grade, stock form, moisture behavior, thermal expansion, flame rating where specified, color, stress cracking risk, and dimensional stability. Confirm resin grade, supplier data sheet, drawing requirement, CTQ fit, moisture condition, and customer approval before changing plastic material or stock source.
PMI verification on stainless steel CNC machined part for material grade approval and heat lot review
PMI verification where material mix-up risk requires confirmation

What buyers should verify on the Mill Test Certificate (MTC)

Review the MTC before approving any substitute grade for a fit-critical, corrosion-sensitive, or customer-controlled CNC part. The MTC should be checked against the released drawing, PO, material callout, product form, finish condition, and inspection requirements. For documentation scope planning, review our quality documents and inspection support.

  • Material grade and approved substitute boundary
  • Product form, such as bar, sheet, plate, tube, or rod
  • Temper, heat treatment, or stock condition
  • Chemistry range and reported composition values
  • Mechanical properties where required by drawing or PO
  • Heat lot, batch, or material traceability code
  • Finish condition, passivation, plating, or coating requirement
  • Actual test results compared with drawing or customer requirement
Critical Sourcing Note for Procurement:

Substitution mistakes often occur when teams treat “equivalent” codes as identical materials. To reduce sourcing risk, the drawing and PO should define approved substitute boundaries, required MTC or CoC evidence, finish condition, and CTQ inspection needs. For high-risk components, PMI or additional material verification may be required before lot acceptance where material mix-up, corrosion exposure, or service-critical fit makes substitution risk unacceptable. For fit-related review, use a tolerance feasibility review for material substitutes and CTQ fits.

Material Approval Evidence to Request Before CNC RFQ or Drawing Release

Material approval for CNC machined parts should be supported by documented evidence before RFQ approval, drawing release, or production lot review. Buyers should define which records are required for the selected material, such as polycarbonate, ABS, nylon, 6061 aluminum, stainless steel, brass, or POM, and confirm whether MTC, CoC, FAI, CMM report, finish evidence, or CTQ inspection is needed for the program.

Baseline document package for non-regulated precision CNC parts

For non-regulated precision components, the required supplier document package should be defined by the drawing, PO, CTQ features, finish condition, and customer approval process. Common baseline records may include the following items. Review our quality documents and inspection support for documentation scope planning:

MTC or material certificate where required
CoC for drawing and PO conformance
CTQ dimensional report or CMM evidence
Program Type Evidence to Define Before RFQ When It Matters
Automotive
  • PPAP support at the level required by the customer
  • Material, finish, and process traceability where required
  • Capability evidence for CTQ features only when a sampling plan is defined
 Automotive programs with customer-specific approval requirements, CTQ features, traceability expectations, or part approval documentation defined before RFQ.
Aerospace
  • AS9102 FAI support where required by the customer program
  • Material lot traceability and MTC review where specified
  • Finish or special-process evidence where the drawing requires it
 Aerospace components requiring first-article review, controlled material evidence, finish documentation, or drawing-linked dimensional inspection.
Medical
  • Material certificate or supplier data sheet where required
  • IQ / OQ / PQ expectations only when defined by the customer program
  • Packaging, cleanliness, or traceability records where specified
 Medical or device-related components where the drawing, customer specification, contact risk, or quality agreement defines material and documentation requirements.

How dimensional inspection should match CTQ features

Critical-to-Quality (CTQ) features are the dimensions or conditions that directly affect part function, fit, safety margin, cosmetic acceptance, or assembly. The inspection method should match the feature type and risk level identified on the drawing. For example, CMM may be used for geometry and positional features, vision inspection may support profile or small-feature checks, and plug gages or thread gages may be used for controlled bores and threads.

For programs with CTQ features identified during the CNC material and finish DFM review, the inspection plan should track those dimensions with appropriate measurement records. This alignment helps buyers review whether material grade, finish condition, machining results, and part acceptance are supported by quality assurance and inspection controls before production release where required.

Common CNC Material Selection Mistakes That Create Cost, Fit, or Quality Risk

Choosing by tensile strength without checking machinability or ductility

What Happens

A material may meet a strength target but still create machining cost, burr risk, tool wear, cracking risk, or poor assembly behavior if ductility, toughness, fatigue behavior, and feature geometry are not reviewed together.

Why It Is Missed

Teams often compare peak data sheet values without checking product form, temper, elongation, impact behavior, machining response, or the actual load case of the CNC machined part.

How to Reduce the Risk

Review tensile strength together with ductility, stiffness, wear condition, tool access, edge condition, and service load before releasing the material callout.

Evidence to Request
Check material grade, product form, temper or resin grade, and mechanical values through quality documents and inspection support where required by the drawing or PO.

Ignoring anodize, plating, or coating buildup on CTQ fits

What Happens

Bores may lose clearance, threads may tighten, sealing faces may shift, or mating features may fail assembly review when the finish effect is not included in the pre-finish machining allowance.

Why It Is Missed

Drawings sometimes list a finish callout but do not clarify whether dimensions apply before finishing or after finishing. Generic coating thickness assumptions can also miss supplier-specific finish behavior.

How to Reduce the Risk

Define finished-condition dimensions for bores, threads, datums, and mating faces. Review masking, machining allowance, and inspection method through a tolerance feasibility review for finish impact on CNC fits.

Evidence to Request
Request finished-condition inspection evidence such as CMM data, plug gage results, thread gage checks, or finish certificate where required by the CTQ feature or customer specification.

Approving equivalent grades without MTC and product-form review

What Happens

Part distortion, finish variation, unexpected tool wear, corrosion mismatch, or dimensional instability may occur when a released grade is replaced by an “equivalent” code with different temper, product form, chemistry, or stock condition.

Why It Is Missed

Equivalent codes are sometimes treated as identical materials, even though aluminum, stainless steel, brass, copper, and engineering plastics can differ by temper, heat lot, sheet or bar condition, resin grade, or supplier stock source.

How to Reduce the Risk

Define approved substitute boundaries on the drawing or PO and review the MTC, product form, finish condition, and customer approval requirement before changing across ASTM, JIS, EN, GB, AISI, or supplier-proposed grades.

Evidence to Request
Verify product form, material grade, temper or resin grade, heat lot, and approved standard callout before substitution approval. Evidence Required: any claimed equivalent grade should be supported by the drawing, PO, MTC, or customer approval record.

Selecting polycarbonate, ABS, nylon, or POM without stability checks

What Happens

Machined plastic parts may show dimensional movement, warpage, creep, surface whitening, or assembly mismatch because of moisture absorption, thermal expansion, internal stress release, fixture release, or service temperature changes.

Why It Is Missed

Engineering plastics are sometimes treated like lower-cost metal replacements, while their moisture behavior, thermal expansion, stress cracking risk, stock condition, and long-term datum stability are not checked against the application.

How to Reduce the Risk

Compare polycarbonate, ABS, nylon, POM, PEEK, and other plastics against CTQ tolerance, environment, wear condition, appearance, and assembly requirement before material lock. Do not assume one plastic grade can replace another without drawing or customer approval.

Evidence to Request
Review supplier data sheet, resin grade, stock form, moisture condition, conditioning plan where applicable, and post-machining dimensional evidence when CTQ fits depend on plastic stability.

What to Define on the Drawing and RFQ Before CNC Material Lock

Before RFQ approval or drawing release, the documentation should define the material grade, approved substitute boundary, finish condition, CTQ dimensions, inspection method, and required evidence package. This is especially important for CNC parts made from polycarbonate, ABS, nylon, 6061 aluminum, stainless steel, brass, POM, or other materials where finish impact, grade equivalence, and dimensional stability can affect final fit.

Material and finish callout

  • Specific material grade, resin grade, temper, or stock condition
  • Approved standard or substitute boundary, such as ASTM, JIS, EN, GB, AISI, or customer-approved equivalent
  • Surface finish callout, such as anodize, passivation, plating, coating, or electroless nickel where required
  • Color, texture, cosmetic surface, or visible appearance requirement where applicable

Post-finish CTQ control

  • Finished-condition CTQ fits on bores, threads, datums, mating faces, and sealing features
  • Masking zones, machining allowance, or post-finish operation needs for precision interfaces
  • Thread class, gage method, or acceptance condition for threaded features
  • GD&T, datum structure, and inspection method for geometry-critical dimensions

Evidence and approval records

  • MTC or material certificate where required by the drawing or PO
  • CoC for drawing, finish, and PO conformance where required
  • FAI support where required by the customer program
  • CMM report, gage result, finish certificate, or CTQ inspection evidence where specified
Requirement Item Why It Matters for RFQ Approval
Material Grade, Resin Grade, or Temper Reduces ambiguity when comparing CNC metals and engineering plastics, including 6061 aluminum, stainless steel, brass, polycarbonate, ABS, nylon, and POM. The released drawing or PO should define whether substitutes are allowed and what evidence is required.
Required Finish Callout Helps the supplier account for anodize, plating, passivation, coating, or electroless nickel effects when planning machining allowance, masking, and finished-condition inspection for fit-critical features.
Post-Finish CTQ Dimensions Requires final fit checks to be evaluated in the finished condition. Review tolerance feasibility before RFQ release to confirm whether the material, finish, and feature requirements are realistic.
Inspection Method Defines whether the part should be verified by CMM, plug gage, thread gage, vision inspection, surface check, or another method appropriate to the CTQ feature and acceptance condition.
Required Document Package The document package should match the material, finish, CTQ risk, and customer approval requirement. Review quality documents and inspection support for MTC, CoC, FAI, CMM reports, finish evidence, and traceability planning.

Need to verify whether your CNC material callouts, finish requirements, and CTQ tolerances are ready for RFQ? Request a CNC material and finish DFM review before finalizing your drawing package.

Request CNC Material and Finish DFM Review Before RFQ

Submit your CAD model and 2D drawing to review material grade, approved substitute boundaries, finish impact on CTQ fits, and the required MTC, CoC, FAI, CMM, or finish inspection evidence before RFQ approval or drawing release.

Material Grade
Finish Impact
CTQ Fit Review
MTC / CoC / FAI
Request CNC Material and Finish DFM Review

Please include material grade, quantity, surface finish, CTQ dimensions, approved substitute limits, and any required quality documents and inspection support.