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REFERENCE IMAGE
EMANON PART NO.
MS21299C5
MS21299C5 is a washer in steel comp 4130 overall and cadmium overall and chromate overall finish.
Washer
REFERENCE IMAGEReference image — representative of the type, not the exact part; verify dimensions per specification.
SPECIFICATIONS
KEY DIMENSIONS
INSIDE DIAMETER0.314–0.318 in
OUTSIDE DIAMETER0.588–0.598 in
MATERIAL & FINISH
MATERIALSteel 4130
MATERIAL SPECMIL-S-6758 or MIL-S-18729
FINISHCadmium and chromate
FINISH SPECQQ-P-416,TY 2,CL 2
MECHANICAL
HARDNESS39–45 HRC
STANDARDS & TRACEABILITY
NSN5310-01-011-3094
ALTERNATE PART NUMBERSMS21299-C5
FLIS · NSN 5310-01-011-3094 · retrieved 2026-08-08
DOCUMENTS
✓Certificate of Conformance — included with every order
No drawing on file — request it
size: 5/16", washer, countersunk, cadmium plated steel
Emanon is a stocking distributor — quality-system certifications are held by the certified manufacturers we source from, not by Emanon. Every shipment carries manufacturer certifications and full lot traceability.