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EMANON PART NO.
NAS6205-21
NAS6205-21 is a bolt in steel comp e4340 overall or steel comp 8740 overall, cadmium overall and chromate overall finish, 0.312 INCHES diameter and 1.735 inches minimum and 1.765 inches maximum length.
Bolt
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.312 in
LENGTHMinimum 1.735 in; maximum 1.765 in
THREAD LENGTHMinimum 0.413 in; maximum 0.463 in
GRIPMinimum 1.302 in; maximum 1.322 in
GRIP DIAMETER0.3110–0.3120 in
THREAD
THREAD5/16-24
HEAD & DRIVE
HEADDished hexagon
HEAD HEIGHTMinimum 0.156 in; maximum 0.171 in
WIDTH ACROSS FLATS0.492–0.502 in
MATERIAL & FINISH
MATERIALSteel comp e4340 overall or steel comp 8740 overall
MATERIAL SPECMIL-S-5000 — MIL SPEC · MIL-S-6049 — MIL SPEC · AMS6322 — ASSN STD
FINISHCadmium overall and chromate overall
FINISH SPECQQ-P-416 TY 2 CL 2
MECHANICAL
TENSILE STRENGTH160,000 psi
HARDNESS36–40 HRC
STANDARDS & TRACEABILITY
NSN5306-01-274-8319
GOVERNING STANDARD80205-NAS6205
FLIS · NSN 5306-01-274-8319 · 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: 1.75", grip: 1.312", thread: 5/16-24, hex head, tension, short thread, 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.