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Technical Data Sheet
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20139-ITEM-4.2.4 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

20139-ITEM-4.2.4: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5305-01-706-3592, 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
20139-ITEM-4.2.4
NSN: 5305-01-706-3592
FSC: 5305 — Screws
CAGE: 28953 — RIX INDUSTRIES (USA)
SPECIFICATIONS
Part Number20139-ITEM-4.2.4
NSN5305-01-706-3592
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 20139-ITEM-4.2.4 · 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
SUBSTITUTES & CROSS-REFERENCES 4
20141 REV D SHEET 1 FIND 5.2.4Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
20139 REV C SHEET 1 FIND 4.2.4Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
20138-28953 SHEET 1 FIND 4.2.4Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
20127-28953 SHEET 1 FIND 3.2.4Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 20139-ITEM-4.2.4?
20139-ITEM-4.2.4 is a SCREW,MACHINE.
What parts can replace 20139-ITEM-4.2.4?
There are 4 known substitutes for 20139-ITEM-4.2.4: 20141 REV D SHEET 1 FIND 5.2.4, 20139 REV C SHEET 1 FIND 4.2.4, 20138-28953 SHEET 1 FIND 4.2.4 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20139-ITEM-4.2.4?
20139-ITEM-4.2.4 is cataloged in the U.S. Government catalog under NSN 5305-01-706-3592. 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.