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EMANON PART NO.
NAS1304-2H
NAS1304-2H is a bolt in steel comp 4140 overall or steel comp e4340 overall or steel comp 6150 overall or steel comp 8735 overall or steel comp 8740 overall, cadmium overall and chromate overall finish, 0.250 INCHES diameter and 0.550 inches nominal length.
Bolt
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTHNominal 0.550 in
THREAD LENGTHMinimum 0.425 in
GRIPNominal 0.125 in
GRIP DIAMETER0.2485–0.2495 in
THREAD
THREAD1/4-28
HEAD & DRIVE
HEADDished hexagon
HEAD HEIGHTNominal 0.125 in
WIDTH ACROSS FLATS0.430–0.439 in
MATERIAL & FINISH
MATERIALSteel comp 4140 overall or steel comp e4340 overall or steel comp 6150 overall or steel comp 8735 overall or steel comp 8740 overall
MATERIAL SPECMIL-S-5626 — MIL SPEC · MIL-S-5000 — MIL SPEC · MIL-S-8503 — MIL SPEC · MIL-S-6098 — MIL SPEC · MIL-S-6049 — MIL SPEC
FINISHCadmium overall and chromate overall
FINISH SPECQQ-P-416,TY 2 CL 2
MECHANICAL
TENSILE STRENGTH160,000 psi
HARDNESS34–40 HRC
STANDARDS & TRACEABILITY
NSN5306-01-339-5411
FLIS · NSN 5306-01-339-5411 · 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: 0.550", thread: 1/4-28, hex head tension bolt, drilled head, cadmium plated alloy 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.