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EMANON PART NO.
NAS6304U4
NAS6304U4 is a bolt in iron alloy 660, 0.250 INCHES diameter and Between 0.605 inches and 0.635 inches length.
Bolt
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTHBetween 0.605 inches and 0.635 inches
THREAD LENGTHMinimum 0.345 in; maximum 0.395 in
GRIPBetween 0.240 inches and 0.260 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 FLATS0.430–0.439 in
MATERIAL & FINISH
MATERIALIron alloy 660
MATERIAL SPECAMS 5731 — ASSN STD · AMS 5737 — ASSN STD
MECHANICAL
TENSILE STRENGTH160,000 psi
STANDARDS & TRACEABILITY
NSN5306-00-492-2584
GOVERNING STANDARD80205-NAS6304
FLIS · NSN 5306-00-492-2584 · retrieved 2026-08-07
DOCUMENTS
✓Certificate of Conformance & test reports available for most products (standard cert fees apply)
No drawing on file — request it
length: 0.620", grip: 0.250", thread: 1/4-28, hex head - short thread - unplated corrosion resistant steel
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.