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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
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
WIDTH ACROSS FLATS0.4280–0.4375 in
THREAD
THREAD1/4-20
MATERIAL & FINISH
MATERIALSteel comp 303 or steel comp 304 or steel comp 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 & test reports available for most products (standard cert fees apply)
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.