Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW
The 4-40 X 1/4 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-116-4101, indicating validated use in U.S.
government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.
WHERE IT FITS
4-40 X 1/4
NSN:5305-00-116-4101 FSC:5305 CAGE:9H691 — ARLINGTON FASTNER CO (USA)
SPECIFICATIONS
Part Number
4-40 X 1/4
NSN
5305-00-116-4101
COMPONENT DIAGRAM
KEY FEATURES
•
MINIMUM TENSILE STRENGTH: 80000 POUNDS PER SQUARE INCH LBS
•
FASTENER LENGTH: 0.219 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: OXIDE
•
HEAD HEIGHT: 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-13924,CL 4 MIL SPEC SINGLE TREATMENT RESPONSE
•
SCREW MATERIAL: STEEL CORROSION RESISTING OR STEEL
•
NOMINAL THREAD DIAMETER: 0.112 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
MINIMUM TENSILE STRENGTH
80000 POUNDS PER SQUARE INCH LBS
FASTENER LENGTH
0.219 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
SCREW SURFACE TREATMENT
OXIDE
HEAD HEIGHT
0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
THREAD SERIES DESIGNATOR
UNIFIED NATIONAL COARSE (UNC)
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION
MIL-C-13924,CL 4 MIL SPEC SINGLE TREATMENT RESPONSE
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FREQUENTLY ASKED QUESTIONS
What is 4-40 X 1/4?
4-40 X 1/4 is a 4-40 X 1/4.
What parts can replace 4-40 X 1/4?
There are 20 known substitutes for 4-40 X 1/4: 455269-18, FF-S-92B TYIII ST 9C, FFS92 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4-40 X 1/4?
4-40 X 1/4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-116-4101. This indicates validated use in U.S. government and defense supply chains.
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