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231837B — BEARING,ROLLER,NEEDLE

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

231837B: BEARING,ROLLER,NEEDLE.

The BEARING,ROLLER,NEEDLE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 3.5000 INCHES NOMINAL IN, overall_width: 1.3750 INCHES NOMINAL IN, alignment_type: RIGID, special_features: OIL HOLE AND OIL GROOVE IN OUTER AND INNER RACE, overall_outside_diameter: 5.0000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-108-7681, 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
231837B
NSN: 3110-00-108-7681
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 56232 — LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter3.5000 INCHES NOMINAL IN
overall_width1.3750 INCHES NOMINAL IN
alignment_typeRIGID
special_featuresOIL HOLE AND OIL GROOVE IN OUTER AND INNER RACE
overall_outside_diameter5.0000 INCHES NOMINAL IN
standard_tolerance_designationAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
NSN3110-00-108-7681
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 231837B · 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: 5.0000 INCHES NOMINAL IN
•
ALIGNMENT TYPE: RIGID
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
•
BORE DIAMETER: 3.5000 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
OVERALL WIDTH1.3750 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER5.0000 INCHES NOMINAL IN
ALIGNMENT TYPERIGID
SPECIAL FEATURESOIL HOLE AND OIL GROOVE IN OUTER AND INNER RACE
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
BORE DIAMETER3.5000 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
FR3 1-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
RS28Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 231837B?
231837B is a BEARING,ROLLER,NEEDLE.
What parts can replace 231837B?
There are 2 known substitutes for 231837B: FR3 1-2, RS28. Substitute compatibility should be verified for your specific system.
What is the NSN for 231837B?
231837B is cataloged in the U.S. Government catalog under NSN 3110-00-108-7681. 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.