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EMANON PART NO.
MS21299-5
MS21299-5 is a washer in steel comp 4130 and cadmium and chromate finish.
Washer
SPECIFICATIONS
KEY DIMENSIONS
INSIDE DIAMETER0.314–0.318 in
OUTSIDE DIAMETER0.588–0.598 in
THICKNESS0.052–0.072 in
SHAPE
PERIPHERAL SHAPERound
CENTER HOLE SHAPERound
CROSS-SECTIONAL SHAPERectangular
MATERIAL & FINISH
MATERIALSteel comp 4130
MATERIAL SPECMIL-S-6758 — MIL SPEC · MIL-S-18729 — MIL SPEC
FINISHCadmium and chromate
FINISH SPECQQ-P-416,TY 2,CL 2
MECHANICAL
HARDNESS39–45 HRC
STANDARDS & TRACEABILITY
NSN5310-01-153-9304
FLIS · NSN 5310-01-153-9304 · retrieved 2026-08-08
DOCUMENTS
✓Certificate of Conformance & test reports available for most products (standard cert fees apply)
No drawing on file — request it
size: 5/16", plain, 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.