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REFERENCE IMAGE
EMANON PART NO.
AN4CH4A
AN4CH4A is a bolt in steel corrosion resisting, passivate finish, 0.250 INCHES diameter and 0.531 INCHES NOMINAL length.
Bolt · listed as AN4CH4A Bolt
REFERENCE IMAGEReference image — representative of the type, not the exact part; verify dimensions per specification.
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTH0.531 in nom
THREAD LENGTH0.469 in MINIMUM
GRIP0.062 in nom
THREAD
THREAD0.250-28 UNF-3A right-hand
HEAD & DRIVE
HEADC1 hexagon
HEAD HEIGHT0.140–0.172 in
WIDTH ACROSS FLATS0.428–0.440 in
MATERIAL & FINISH
MATERIALSTEEL CORROSION RESISTING
MATERIAL SPECQQ-S-770
FINISHPASSIVATE
MECHANICAL
TENSILE STRENGTH125,000 psi
STANDARDS & TRACEABILITY
NSN5306-00-180-2778
GOVERNING STANDARDAN4CH4A
FLIS · NSN 5306-00-180-2778 · retrieved 2026-08-09
DOCUMENTS
✓Certificate of Conformance — included with every order
No drawing on file — request it
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.