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EMANON PART NO.
NAS623-4-3
NAS623-4-3 is a screw in steel comp 4140 or steel comp e4340 or steel comp 8740, cadmium and chromate finish, 0.250 INCHES diameter and 0.489 inches minimum and 0.519 inches maximum length.
Screw
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTHMinimum 0.489 in; maximum 0.519 in
THREAD LENGTHMinimum 0.291 in; maximum 0.341 in
GRIP0.188
THREAD
THREAD1/4-28
HEAD & DRIVE
HEADPan
HEAD HEIGHTMinimum 0.162 in; maximum 0.175 in
HEAD DIAMETER0.473–0.492 in
MATERIAL & FINISH
MATERIALSTEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 8740
FINISHCADMIUM AND CHROMATE
MECHANICAL
TENSILE STRENGTH160,000 psi
HARDNESS36–40 HRC
STANDARDS & TRACEABILITY
NSN5305-00-687-3295
GOVERNING STANDARD80205-NAS623
DOCUMENTS
✓Certificate of Conformance & test reports available for most products (standard cert fees apply)
No drawing on file — request it
length: 0.504", grip: 0.188", thread: 1/4-28, pan head, short thread, philips recess, cadmium plated alloy steel, NAS623 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.