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REFERENCE IMAGE
EMANON PART NO.
NAS1351N4H20
NAS1351N4H20 is a screw in iron alloy 660 overall, passivate overall finish, 0.250 INCHES diameter and 1-1/4 length.
Screw
REFERENCE IMAGEReference image — representative of the type, not the exact part; verify dimensions per specification.
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTH1.250 in (1-1/4)
THREAD LENGTH1.000 in MINIMUM
THREAD
THREAD1/4-28
HEAD & DRIVE
HEADFlat chamfer
HEAD HEIGHT0.244–0.250 in
WIDTH ACROSS FLATS0.188–0.190 in
MATERIAL & FINISH
MATERIALIron 660
MATERIAL SPECAMS 5731 or AMS 5737
FINISHPassivate
FINISH SPECQQ-P-35
MECHANICAL
TENSILE STRENGTH160,000 psi
STANDARDS & TRACEABILITY
NSN5305-01-127-8483
GOVERNING STANDARD80205-NAS1351
FLIS · NSN 5305-01-127-8483 · retrieved 2026-08-09
DOCUMENTS
✓Certificate of Conformance — included with every order
No drawing on file — request it
Fastener Length: 1-1/4", Hole Diameter: 3/64", Thread: 1/4-28, Head Width: 3/16", Thread Length: 1", drilled 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.