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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
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTHBetween 1.234 inches and 1.281 inches
THREAD LENGTHMinimum 1.210 in; maximum 1.250 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 comp 302 or steel comp 304 or steel comp 305 or steel comp 316 or steel comp 384 or steel comp xm-7
MATERIAL SPEC66 — FED STD · 66 — FED STD · 66 — FED STD · 66 — FED STD · 66 — FED STD · ASTM A493 — ASSN STD
FINISHPassivate
FINISH SPECQQ-P-35
MECHANICAL
TENSILE STRENGTH80,000 psi
HARDNESS≥80 HRB
STANDARDS & TRACEABILITY
NSN5305-00-235-9883
ALTERNATE PART NUMBERSMS16996-25
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, 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.