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EMANON PART NO.
MS51971-4
MS51971-4 is a nut in steel comp 304 overall, passivate overall finish and 0.438 INCHES diameter.
Nut
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.438 in
WIDTH ACROSS FLATS0.6750–0.6875 in
THREAD
THREAD0.438 inches
MATERIAL & FINISH
MATERIALSteel comp 304 overall
MATERIAL SPECQQ-S-763 — FED SPEC
FINISHPassivate overall
FINISH SPECQQ-P-35
MECHANICAL
HARDNESSNot rated
STANDARDS & TRACEABILITY
NSN5310-00-965-1800
GOVERNING STANDARDMS51971-4
FLIS · NSN 5310-00-965-1800 · retrieved 2026-08-08
DOCUMENTS
✓Certificate of Conformance & test reports available for most products (standard cert fees apply)
No drawing on file — request it
MS51971-4 Plain Hexagon 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.