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EMANON PART NO.
NAS6304U1
NAS6304U1 is a bolt in iron alloy 660, passivate finish, 0.250 INCHES diameter and 7/16 length.
Bolt
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTH0.438 in (7/16)
THREAD LENGTHMinimum 0.345 in; maximum 0.395 in
GRIPBetween 0.052 inches and 0.072 inches
GRIP DIAMETER0.2490–0.2495 in
THREAD
THREAD1/4-28
HEAD & DRIVE
HEADDished hexagon
HEAD HEIGHTMinimum 0.125 in; maximum 0.140 in
WIDTH ACROSS FLATS0.429–0.439 in
MATERIAL & FINISH
MATERIALIron alloy 660
MATERIAL SPECAMS 5731 — ASSN STD · AMS 5737 — ASSN STD
FINISHPassivate
MECHANICAL
TENSILE STRENGTH160,000 psi
STANDARDS & TRACEABILITY
NSN5306-01-133-2184
GOVERNING STANDARD80205-NAS6304
FLIS · NSN 5306-01-133-2184 · retrieved 2026-08-07
DOCUMENTS
✓Certificate of Conformance & test reports available for most products (standard cert fees apply)
No drawing on file — request it
Fastener Length: 7/16", Thread: 1/4-28, Thread Length: 25/64", NAS6304 series bolt
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.