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Technical Data Sheet
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021-01538 — 021-01538

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

021-01538: 021-01538.

The 021-01538 is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: STEEL,UNCOATED,7/16-14 UNC 2A THD SIZE,1.250 IN.LG A. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-006-9249, 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
021-01538
NSN: 5305-00-006-9249
FSC: 5305 — Screws
CAGE: 66935 — JOHNSON CONTROLS NAVY SYSTEMS, LLC (USA)
SPECIFICATIONS
general_characteristics_item_descriptionSTEEL,UNCOATED,7/16-14 UNC 2A THD SIZE,1.250 IN.LG A
NSN5305-00-006-9249
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 021-01538 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: STEEL,UNCOATED,7/16-14 UNC 2A THD SIZE,1.250 IN.LG A
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTEEL,UNCOATED,7/16-14 UNC 2A THD SIZE,1.250 IN.LG A
SUBSTITUTES & CROSS-REFERENCES 1
21-1538Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 021-01538?
021-01538 is a 021-01538.
What parts can replace 021-01538?
There is 1 known substitute for 021-01538: 21-1538. Substitute compatibility should be verified for your specific system.
What is the NSN for 021-01538?
021-01538 is cataloged in the U.S. Government catalog under NSN 5305-00-006-9249. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.