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REFERENCE IMAGE
EMANON PART NO.
NAS509-4
NAS509-4 is a nut in steel comp 4130, cadmium and chromate finish and 0.250 INCHES diameter.
Nut
REFERENCE IMAGEReference image — representative of the type, not the exact part; verify dimensions per specification.
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
WIDTH ACROSS FLATS0.428–0.440 in
THREAD
THREAD1/4-28
MATERIAL & FINISH
MATERIALSteel 4130
MATERIAL SPECMIL-S-6758,COND F4
FINISHCadmium and chromate
FINISH SPECQQ-P-416,TY 2,CL 2
MECHANICAL
HARDNESS34–38 HRC
STANDARDS & TRACEABILITY
NSN5310-00-141-3010
FLIS · NSN 5310-00-141-3010 · retrieved 2026-08-08
DOCUMENTS
✓Certificate of Conformance — included with every order
No drawing on file — request it
Thread: 1/4-28, drilled jam nut, alloy steel material, NAS509 series nut
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.