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REFERENCE IMAGE
EMANON PART NO.
NAS1587-4C
NAS1587-4C is a washer in steel and passivate finish.
Washer
REFERENCE IMAGEReference image — representative of the type, not the exact part; verify dimensions per specification.
SPECIFICATIONS
KEY DIMENSIONS
INSIDE DIAMETER0.252–0.260 in
OUTSIDE DIAMETER0.531 in
MATERIAL & FINISH
MATERIALSteel
MATERIAL SPECQQ-S-763 or QQ-S-763 or MIL-S-6721 ALL MATERIAL RESPONSES
FINISHPassivate
STANDARDS & TRACEABILITY
NSN5310-00-476-7367
GOVERNING STANDARD80205-NAS1587
FLIS · NSN 5310-00-476-7367 · retrieved 2026-08-08
DOCUMENTS
✓Certificate of Conformance — included with every order
No drawing on file — request it
Size: 1/4", countersunk, corrosion resistant steel, NAS1587 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.