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REFERENCE IMAGE
EMANON PART NO.
MS21299-4
MS21299-4 is a washer in steel comp 4130, cadmium and chromate finish and 31/64 diameter.
Washer
REFERENCE IMAGEReference image — representative of the type, not the exact part; verify dimensions per specification.
SPECIFICATIONS
KEY DIMENSIONS
INSIDE DIAMETER0.250 in (1/4)
OUTSIDE DIAMETER0.481–0.491 in
THICKNESS0.063 in (1/16)
SHAPE
PERIPHERAL SHAPERound
CENTER HOLE SHAPERound
CROSS-SECTIONAL SHAPERectangular
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
NSN5310-01-121-8521
FLIS · NSN 5310-01-121-8521 · retrieved 2026-08-08
DOCUMENTS
✓Certificate of Conformance — included with every order
No drawing on file — request it
Hole Diameter: 1/4", Diameter: 31/64", Thickness: 1/16", MS21299 series washer
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.