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Technical Data Sheet
PartsTable / COMPONENT / 1/4-20-1
1/4-20-1 ✓ 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 1/4-20-1 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 5306-00-973-5256, 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
1/4-20-1
NSN: 5306-00-973-5256
FSC: 5306
CAGE: 18702 — DUCOMMUN METALS CO (USA)
SPECIFICATIONS
Part Number1/4-20-1
NSN5306-00-973-5256
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1/4-20-1 · 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: 60000 POUNDS PER SQUARE INCH LBS
•
HEAD STYLE: SQUARE
•
THREAD QUANTITY PER INCH: 20
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
MATERIAL: STEEL OVERALL
•
FEATURES PROVIDED: UNFINISHED HEAD AND HEX NUT
•
THREAD LENGTH: 0.750 INCHES MINIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
MINIMUM TENSILE STRENGTH60000 POUNDS PER SQUARE INCH LBS
HEAD STYLESQUARE
THREAD QUANTITY PER INCH20
NOMINAL THREAD DIAMETER0.250 INCHES IN
MATERIALSTEEL OVERALL
FEATURES PROVIDEDUNFINISHED HEAD AND HEX NUT
THREAD LENGTH0.750 INCHES MINIMUM IN
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS2A A
FASTENER LENGTH1.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
14201Upgraded Successor
successor cross-reference
successor
G9002PC71-72-79Interchangeable
interchangeable cross-reference
interchangeable
G7556PC85T087Interchangeable
interchangeable cross-reference
interchangeable
G7182PC95-104-120Interchangeable
interchangeable cross-reference
interchangeable
26483Interchangeable
interchangeable cross-reference
interchangeable
48208Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1/4-20-1?
1/4-20-1 is a 1/4-20-1.
What parts can replace 1/4-20-1?
There are 11 known substitutes for 1/4-20-1: 14201, G9002PC71-72-79, G7556PC85T087 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1/4-20-1?
1/4-20-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-973-5256. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026