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Technical Data Sheet
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4-40 X 1/4 — Technical Data Sheet

✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include head_style: PAN, head_height: 0.060 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, thread_length: 0.200 INCHES NOMINAL IN, screw_material: STEEL CORROSION RESISTING. 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
head_stylePAN
head_height0.060 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
thread_length0.200 INCHES NOMINAL IN
screw_materialSTEEL CORROSION RESISTING
fastener_length0.250 INCHES NOMINAL IN
special_featuresCREST CUP SPRING WASHER
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.112 INCHES IN
thread_quantity_per_inch40
NSN5305-00-116-4101
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4-40 X 1/4 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
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 STRENGTH80000 POUNDS PER SQUARE INCH LBS
FASTENER LENGTH0.219 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTOXIDE
HEAD HEIGHT0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-13924,CL 4 MIL SPEC SINGLE TREATMENT RESPONSE
SCREW MATERIALSTEEL CORROSION RESISTING OR STEEL
NOMINAL THREAD DIAMETER0.112 INCHES IN
THREAD DIRECTIONRIGHT-HAND
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
455269-18Interchangeable
interchangeable cross-reference
interchangeable
FF-S-92B TYIII ST 9CInterchangeable
interchangeable cross-reference
interchangeable
FFS92Interchangeable
interchangeable cross-reference
interchangeable
4-40X1-4RDHDInterchangeable
interchangeable cross-reference
interchangeable
AN515-4-4Interchangeable
interchangeable cross-reference
interchangeable
FFS92ANDTYPE1ANDSTYLE1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4-40 X 1/4?
4-40 X 1/4 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 4-40 X 1/4?
There are 18 known substitutes for 4-40 X 1/4: 455269-18, FF-S-92B TYIII ST 9C, FFS92 and 15 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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PartsTable Design LLC · partstable.com
Last verified: September 2026