PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 42420-251
42420-251 ✓ Verified by PartsTable
— · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

The BEARING,ROLLER,NEEDLE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 0.7500 INCHES NOMINAL IN, overall_width: 0.5000 INCHES NOMINAL IN, alignment_type: RIGID, surface_finish: GROUND, style_designator: NON-SEPARABLE, OPEN END, DRAWN SHELL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-004-3343, 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
42420-251
NSN: 3110-00-004-3343
FSC: 3110
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter0.7500 INCHES NOMINAL IN
overall_width0.5000 INCHES NOMINAL IN
alignment_typeRIGID
surface_finishGROUND
style_designatorNON-SEPARABLE, OPEN END, DRAWN SHELL
overall_outside_diameter1.0000 INCHES NOMINAL IN
NSN3110-00-004-3343
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 42420-251 · 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
•
BORE DIAMETER: 0.7500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NON-SEPARABLE, OPEN END, DRAWN SHELL
•
MATERIAL: STEEL OVERALL
•
ALIGNMENT TYPE: RIGID
•
SURFACE FINISH: GROUND
•
OVERALL OUTSIDE DIAMETER: 1.0000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER0.7500 INCHES NOMINAL IN
STYLE DESIGNATORNON-SEPARABLE, OPEN END, DRAWN SHELL
MATERIALSTEEL OVERALL
ALIGNMENT TYPERIGID
SURFACE FINISHGROUND
OVERALL OUTSIDE DIAMETER1.0000 INCHES NOMINAL IN
OVERALL WIDTH0.5000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
B12-8Interchangeable
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B12.8Interchangeable
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052643Interchangeable
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1134-7Interchangeable
interchangeable cross-reference
interchangeable
12Z10023-10Interchangeable
interchangeable cross-reference
interchangeable
77924Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 42420-251?
42420-251 is a BEARING,ROLLER,NEEDLE.
What parts can replace 42420-251?
There are 16 known substitutes for 42420-251: B12-8, B12.8, 052643 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 42420-251?
42420-251 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-004-3343. 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