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W1381A — BEARING,ROLLER,NEEDLE

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

W1381A: BEARING,ROLLER,NEEDLE.

The BEARING,ROLLER,NEEDLE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 1.7495 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN, overall_width: 1.3700 INCHES MINIMUM AND 1.3750 INCHES MAXIMUM IN, alignment_type: SELF-ALIGNING, overall_outside_diameter: 2.2500 INCHES MINIMUM AND 2.4995 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-151-9389, 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
W1381A
NSN: 3110-00-151-9389
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 21335 — TIMKEN CO DIV THE TIMKEN COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter1.7495 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN
overall_width1.3700 INCHES MINIMUM AND 1.3750 INCHES MAXIMUM IN
alignment_typeSELF-ALIGNING
overall_outside_diameter2.2500 INCHES MINIMUM AND 2.4995 INCHES MAXIMUM IN
NSN3110-00-151-9389
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: W1381A · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OVERALL OUTSIDE DIAMETER: 2.2500 INCHES MINIMUM AND 2.4995 INCHES MAXIMUM IN
•
ALIGNMENT TYPE: SELF-ALIGNING
•
BORE DIAMETER: 1.7495 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
OVERALL WIDTH1.3700 INCHES MINIMUM AND 1.3750 INCHES MAXIMUM IN
OVERALL OUTSIDE DIAMETER2.2500 INCHES MINIMUM AND 2.4995 INCHES MAXIMUM IN
ALIGNMENT TYPESELF-ALIGNING
BORE DIAMETER1.7495 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
425690-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is W1381A?
W1381A is a BEARING,ROLLER,NEEDLE.
What parts can replace W1381A?
There is 1 known substitute for W1381A: 425690-3. Substitute compatibility should be verified for your specific system.
What is the NSN for W1381A?
W1381A is cataloged in the U.S. Government catalog under NSN 3110-00-151-9389. 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.