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REFERENCE IMAGE
EMANON PART NO.
NAS1351C4-20
NAS1351C4-20 is a screw in steel comp 302 or steel comp 304 or steel comp 305 or steel comp 316 or steel comp 384 or steel comp xm-7, passivate finish, 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 LENGTH1.210–1.250 in
THREAD
THREAD1/4-28
HEAD & DRIVE
HEADFlat chamfer
HEAD HEIGHT0.244–0.250 in
WIDTH ACROSS FLATS0.188–0.190 in
MATERIAL & FINISH
MATERIALSteel 302/304/305/316 +2
MATERIAL SPEC66 FED STD or 66 FED STD or 66 FED STD or 66 FED STD or 66 FED STD or ASTM A493
FINISHPassivate
FINISH SPECQQ-P-35
MECHANICAL
TENSILE STRENGTH80,000 psi
HARDNESS≥80 HRB
STANDARDS & TRACEABILITY
NSN5305-00-235-9883
ALTERNATE PART NUMBERSMS16996-25
FLIS · NSN 5305-00-235-9883 · retrieved 2026-08-07
DOCUMENTS
✓Certificate of Conformance — included with every order
No drawing on file — request it
length: 1-1/4", thread: 1/4-28, socket head, corrosion resistant steel, 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.