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REFERENCE IMAGE
EMANON PART NO.
NAS1351-4-20
NAS1351-4-20 is a screw in steel, 0.250 INCHES diameter and Between 1.234 inches and 1.281 inches length.
Screw
REFERENCE IMAGEReference image — representative of the type, not the exact part; verify dimensions per specification.
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTH1.234–1.281 in
THREAD LENGTH1.000 in MINIMUM
THREAD
THREAD0.250-28 UNF-3A right-hand
HEAD & DRIVE
HEADFlat chamfer
HEAD HEIGHT0.244–0.250 in
WIDTH ACROSS FLATS0.188–0.190 in
MATERIAL & FINISH
MATERIALSteel
MATERIAL SPEC66 FED STD
MECHANICAL
TENSILE STRENGTH160,000 psi
HARDNESS36–45 HRC
STANDARDS & TRACEABILITY
NSN5305-00-928-6858
FLIS · NSN 5305-00-928-6858 · retrieved 2026-08-07
DOCUMENTS
✓Certificate of Conformance — included with every order
No drawing on file — request it
Steel alloy, flat head, NAS1351 series screw
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.