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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
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTH1.250 in (1-1/4)
THREAD LENGTHMinimum 1.000 in
THREAD
THREAD1/4-28
HEAD & DRIVE
HEADFlat chamfer
HEAD HEIGHTMinimum 0.244 in; maximum 0.250 in
HEAD DIAMETER0.365–0.375 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
DOCUMENTS
✓Certificate of Conformance & test reports available for most products (standard cert fees apply)
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.