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REFERENCE IMAGE
EMANON PART NO.
NAS517-4-2
NAS517-4-2 is a screw in steel, cadmium and chromate finish, 0.250 INCHES diameter and Between 0.579 inches and 0.624 inches length.
Screw
REFERENCE IMAGEReference image — representative of the type, not the exact part; verify dimensions per specification.
SPECIFICATIONS
KEY DIMENSIONS
DIAMETER0.250 in
LENGTH0.579–0.624 in
THREAD LENGTH0.402–0.473 in
GRIP0.125
THREAD
THREAD1/4-28 shear
HEAD & DRIVE
HEADFlat countersunk
MATERIAL & FINISH
MATERIALSteel
FINISHCadmium and chromate
MECHANICAL
TENSILE STRENGTH160,000 psi
STANDARDS & TRACEABILITY
NSN5305-00-638-6400
GOVERNING STANDARD80205-NAS517
FLIS · NSN 5305-00-638-6400 · retrieved 2026-08-07
DOCUMENTS
✓Certificate of Conformance — included with every order
No drawing on file — request it
length: 0.594", grip: 0.125", thread: 1/4-28 shear, close tolerance, alloy steel
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.