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REFERENCE IMAGE
EMANON PART NO.
NAS1351-4-20P
NAS1351-4-20P is a screw in steel, cadmium and chromate 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
MATERIALSteel
FINISHCadmium and chromate
FINISH SPECQQ-P-416 TY2 CL2
MECHANICAL
TENSILE STRENGTH180,000 psi
HARDNESS38–45 HRC
STANDARDS & TRACEABILITY
NSN5305-00-771-4754
GOVERNING STANDARD80205-NAS1351
ALTERNATE PART NUMBERSMS16998-46
FLIS · NSN 5305-00-771-4754 · retrieved 2026-08-09
DOCUMENTS
✓Certificate of Conformance — included with every order
No drawing on file — request it
Length: 1-1/4", Thread: 1/4-28, Head Width: 3/16", Thread Length: 1", 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.