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REFERENCE IMAGE
EMANON PART NO.
MS21250-08028
MS21250-08028 is a bolt in steel comp 8740 or steel comp e4340 or steel comp 4340 or steel comp 6150 or steel comp 4140, cadmium and chromate finish, 0.250 INCHES diameter and 4-3/8 length.
Bolt
REFERENCE IMAGEReference image — representative of the type, not the exact part; verify dimensions per specification.
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTH4.375 in (4-3/8)
GRIP DIAMETER0.2485–0.2495 in
THREAD
THREAD1/4-28
HEAD & DRIVE
HEADDouble hexagon w/hole
HEAD HEIGHT0.300 in nom
WIDTH ACROSS FLATS0.304–0.313 in
MATERIAL & FINISH
MATERIALSteel 8740/e4340/4340/6150 +1
FINISHCadmium and chromate
MECHANICAL
TENSILE STRENGTH180,000 psi
HARDNESS39–43 HRC
STANDARDS & TRACEABILITY
NSN5306-01-452-4443
FLIS · NSN 5306-01-452-4443 · retrieved 2026-08-09
DOCUMENTS
✓Certificate of Conformance — included with every order
No drawing on file — request it
Thread: 1/4-28
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.