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EMANON PART NO.
AN565AC428H5
AN565AC428H5 is a screw in steel comp 303se overall, passivate overall finish, 0.250 INCHES diameter and 5/16 length.
Screw
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTH0.313 in (5/16)
THREAD LENGTHMinimum 0.302 in; maximum 0.322 in
THREAD
THREAD1/4-28
HEAD & DRIVE
HEADHeadless (setscrew)
WIDTH ACROSS FLATS0.125–0.127 in
MATERIAL & FINISH
MATERIALSteel comp 303se overall
MATERIAL SPECASTM A582 — ASSN STD
FINISHPassivate overall
FINISH SPECQQ-P-35
STANDARDS & TRACEABILITY
NSN5305-00-001-4843
GOVERNING STANDARDAN565AC428H5
FLIS · NSN 5305-00-001-4843 · 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: 5/16", Thread: 1/4-28, Head Width: 1/8", Thread Length: 5/16"
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.