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EMANON PART NO.
NAS6704-21
NAS6704-21 is a bolt in iron alloy 660 overall, cadmium overall and chromate overall finish, 0.250 INCHES diameter and 1-3/4 length.
Bolt
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTH1.750 in (1-3/4)
THREAD LENGTHNominal 0.425 in
GRIPMinimum 1.302 in; maximum 1.322 in
GRIP DIAMETER0.2485–0.2495 in
THREAD
THREAD1/4-28
HEAD & DRIVE
HEADHexagon
HEAD HEIGHTMinimum 0.125 in; maximum 0.140 in
WIDTH ACROSS FLATS0.429–0.439 in
MATERIAL & FINISH
MATERIALIron alloy 660 overall
MATERIAL SPECAMS5731 — ASSN STD · AMS5737 — ASSN STD
FINISHCadmium overall and chromate overall
FINISH SPECQQ-P-416 TY2 CL2
MECHANICAL
TENSILE STRENGTH160,000 psi
STANDARDS & TRACEABILITY
NSN5306-01-343-2342
GOVERNING STANDARD80205-NAS6704
FLIS · NSN 5306-01-343-2342 · retrieved 2026-08-09
DOCUMENTS
✓Certificate of Conformance & test reports available for most products (standard cert fees apply)
No drawing on file — request it
Fastener Length: 1-3/4", Thread: 1/4-28, Thread Length: 27/64
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.