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REFERENCE IMAGE
EMANON PART NO.
NAS1304-48D
NAS1304-48D is a bolt in steel comp e4340 overall or steel comp 8740 overall, cadmium overall and chromate overall finish, 0.250 INCHES diameter and 3-7/16 length.
Bolt
REFERENCE IMAGEReference image — representative of the type, not the exact part; verify dimensions per specification.
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTH3.438 in (3-7/16)
THREAD LENGTH0.400–0.450 in
GRIP2.990–3.010 in
GRIP DIAMETER0.2485–0.2495 in
THREAD
THREAD1/4-28
HEAD & DRIVE
HEADDished hexagon
HEAD HEIGHT0.110–0.125 in
WIDTH ACROSS FLATS0.429–0.439 in
MATERIAL & FINISH
MATERIALSteel e4340/8740
MATERIAL SPECMIL-S-5000 or MIL-S-6049 or AMS 6322
FINISHCadmium and chromate
FINISH SPECQQ-P-416 TY 2 CL 2
MECHANICAL
TENSILE STRENGTH160,000 psi
HARDNESS36–40 HRC
STANDARDS & TRACEABILITY
NSN5306-01-275-3280
GOVERNING STANDARD80205-NAS6604
FLIS · NSN 5306-01-275-3280 · retrieved 2026-08-09
DOCUMENTS
✓Certificate of Conformance — included with every order
No drawing on file — request it
Fastener Length: 3-7/16", Thread: 1/4-28, Thread Length: 7/16"
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.