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EMANON PART NO.
NAS6604-18
NAS6604-18 is a bolt in steel comp e4340 or steel comp 4340 or steel comp 8740, cadmium and chromate finish, 0.250 INCHES diameter and Between 1.535 inches and 1.565 inches length.
Bolt
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTHBetween 1.535 inches and 1.565 inches
THREAD LENGTHMinimum 0.400 in; maximum 0.450 in
GRIPBetween 1.115 inches and 1.135 inches
GRIP DIAMETER0.2485–0.2495 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
MATERIALSteel comp e4340 or steel comp 4340 or steel comp 8740
FINISHCadmium and chromate
FINISH SPECQQ-P-416,TYPE 2,CLASS 2
MECHANICAL
TENSILE STRENGTH160,000 psi
HARDNESS36–40 HRC
STANDARDS & TRACEABILITY
NSN5306-01-121-2709
GOVERNING STANDARD80205-NAS6604
FLIS · NSN 5306-01-121-2709 · 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: 1.55", grip: 1.125", thread: 1/4-28, hex head, tension, long thread, cadmium plated alloy steel, NAS6604 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.