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REFERENCE IMAGE
EMANON PART NO.
MS51971-1
MS51971-1 is a nut in steel comp 303 or steel comp 304 or steel comp 440c, passivate 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 FLATS0.4280–0.4375 in
THREAD
THREAD1/4-20
MATERIAL & FINISH
MATERIALSteel 303/304/440c
FINISHPassivate
FINISH SPECQQ-P-35
MECHANICAL
HARDNESSNot rated
STANDARDS & TRACEABILITY
NSN5310-00-903-5966
GOVERNING STANDARDMS51971-1
FLIS · NSN 5310-00-965-1799, 5310-00-903-5966, 5310-01-465-1014 · retrieved 2026-08-08
DOCUMENTS
✓Certificate of Conformance — included with every order
No drawing on file — request it
Thread: 1/4-20, Height: 1/4", Head Width: 3/8, MS51971 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.