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EMANON PART NO.
NAS428-4-16
NAS428-4-16 is a bolt in steel comp 4037 overall or steel comp 4130 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 8740 overall or steel comp 4140 overall, cadmium overall and chromate overall finish, 0.250 INCHES diameter and 1-3/4 length.
Bolt
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTH1.750 in (1-3/4)
THREAD LENGTHMinimum 1.688 in; maximum 1.719 in
GRIPMinimum 0.031 in; maximum 0.062 in
THREAD
THREAD1/4-28
HEAD & DRIVE
HEADCrowned hexagon
HEAD HEIGHTNominal 0.141 in
WIDTH ACROSS FLATS0.438 in nom
MATERIAL & FINISH
MATERIALSteel comp 4037 overall or steel comp 4130 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 8740 overall or steel comp 4140 overall
MATERIAL SPECMIL-B-6812 — MIL SPEC
FINISHCadmium overall and chromate overall
FINISH SPECQQ-P-416 TY 2 CL 3 ALL TREATMENT RESPONSES
MECHANICAL
TENSILE STRENGTH125,000 psi
HARDNESS26–32 HRC
STANDARDS & TRACEABILITY
NSN5306-00-282-4301
FLIS · NSN 5306-00-282-4301 · retrieved 2026-08-09
DOCUMENTS
✓Certificate of Conformance & test reports available for most products (standard cert fees apply)
No drawing on file — request it
Fastener Length: 1-3/4", Thread: 1/4-28, Thread Length: 1-23/32
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.