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REFERENCE IMAGE
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
REFERENCE IMAGEReference image — representative of the type, not the exact part; verify dimensions per specification.
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTH1.535–1.565 in
THREAD LENGTH0.400–0.450 in
GRIP1.115–1.135 in
GRIP DIAMETER0.2485–0.2495 in
THREAD
THREAD1/4-28
HEAD & DRIVE
HEADDished hexagon
HEAD HEIGHT0.125–0.140 in
WIDTH ACROSS FLATS0.429–0.439 in
MATERIAL & FINISH
MATERIALSteel e4340/4340/8740
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 — included with every order
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.