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Mil-spec CNC machining guides for buyers
Plain answers on specs, export control, material rules and inspection documents for defense-adjacent machined parts.
CMM Inspection Reports for Defense Parts: What to Request From the SupplierCMM inspection report requirements for defense CNC parts: ballooned drawing, nominal vs actual data, probe and calibration records, formats and sampling plans.
CARC Coating Over Machined Parts: Surface Prep, Primer and Topcoat SpecsCARC coating on machined parts: MIL-DTL-53039 and 64159 topcoats, epoxy primers, aluminum and steel pretreatment, masking and who should apply the system.
AMS vs ASTM Material Specs: How to Read the Material Callout on a Defense DrawingAMS material specification vs ASTM for CNC buyers: what each adds, how to read a callout, why equivalents are not equal and how to handle substitutions.
Passivation to AMS 2700 and ASTM A967 for Stainless Steel Machined PartsAMS 2700 vs ASTM A967 passivation for machined stainless parts: nitric vs citric baths, what the test proves, grade limits and how to write the drawing note.
Aluminum Bronze and Monel for Marine Defense Hardware: Machining and Sourcing GuideAluminum bronze machining and Monel 400 vs K-500 for marine hardware: seawater performance, galvanic pairing, machining tips and callouts for CNC buyers.
7075-T6 vs 6061-T6 Aluminum for Mil-Spec Machined Parts: Strength, Cost and Limits7075 vs 6061 machining for mil-spec parts: strength, corrosion, weldability, stress corrosion, anodize response, cost and when 7075-T73 is the safer pick.
4140 vs 4340 Steel for Defense Machined Parts: Heat Treat, Toughness and Cost4340 steel machining compared with 4140 for defense parts: hardenability, toughness, typical heat treat condition, AMS callouts, plating and cost trade-offs.
17-4 PH Stainless From H900 to H1150: How to Pick the Heat Treat Condition17-4 PH H1025 and other aging conditions compared: strength, toughness, hardness, stress corrosion risk, distortion and machining order for CNC parts.
Machined Parts for Military and Aviation Ground Support EquipmentGround support equipment machining guide: part types, 6061 to 4140 materials, anodize, chem film and CARC finishes, tolerances and part marking for GSE buyers.
DFARS Specialty Metals: What Buyers of Machined Parts Must CheckDFARS specialty metals explained for machined parts: which alloys are covered, why melt location beats machining location and how suppliers prove compliance.
What an AS9102 First Article Inspection Report Should ContainWhat a first article inspection report in AS9102 format contains, when a delta FAI is triggered and how to review one from an offshore supplier before release.
MIL-PRF-8625 Anodizing: Type II vs Type III Hardcoat on Machined PartsMIL-PRF-8625 Type 3 hardcoat anodize vs Type 2: thickness, growth, masking, sealing, 6061 vs 7075 and how to call it out so bores and threads still fit.
What to Put in a Defense-Adjacent Machining RFQ So It Gets Quoted FastCNC RFQ checklist for defense-adjacent machined parts: model, drawing, specs, FAI, certs, DFARS flags, Incoterm and export statement for a fast quote.
EO 14415 and Offshore Machining: What Defense Buyers Should Ask a Supplier NowEO 14415 tightens defense supply chain sourcing from 2027. What buyers of offshore CNC parts should ask for now: raw material origin, mill certs and supplier data.
ITAR, EAR and Offshore CNC Machining: What a Buyer Can Legally SendITAR CNC machining and offshore suppliers: USML vs EAR, EAR99 and 600-series, technical data vs the part, CUI under DFARS 7012 and a decision table for buyers.
What Mil-Spec CNC Machining Means on a Drawing and How to Source ItMil-spec CNC machining explained: what MIL-STD, MIL-DTL, MIL-PRF and AMS callouts require, which ones drive cost and what evidence a supplier must deliver.