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Technical Data Sheet
PartsTable / COMPONENT / MS51961-39
MS51961-39 ✓ 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 criticality_code_justification: ZZZY, reference_number_differentiating_characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-901-2128, 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
MS51961-39
NSN: 3110-00-901-2128
FSC: 3110
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
NSN3110-00-901-2128
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: MS51961-39 · 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: 4.2492 INCHES MINIMUM AND 4.2500 INCHES MAXIMUM IN
•
BORE DIAMETER: 3.2512 INCHES MINIMUM AND 3.2524 INCHES MAXIMUM IN
•
ALIGNMENT TYPE: RIGID
•
STYLE DESIGNATOR: NON-SEPARABLE, WITH ROLLER RETAINER, HARDENED AND GROUND
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH1.7450 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN
SPECIAL FEATURESOIL HOLE AND GROOVE IN OUTER RING
OVERALL OUTSIDE DIAMETER4.2492 INCHES MINIMUM AND 4.2500 INCHES MAXIMUM IN
BORE DIAMETER3.2512 INCHES MINIMUM AND 3.2524 INCHES MAXIMUM IN
ALIGNMENT TYPERIGID
STYLE DESIGNATORNON-SEPARABLE, WITH ROLLER RETAINER, HARDENED AND GROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
FE21500Interchangeable
interchangeable cross-reference
interchangeable
N5507Interchangeable
interchangeable cross-reference
interchangeable
N10507Interchangeable
interchangeable cross-reference
interchangeable
DA2-500K0HMInterchangeable
interchangeable cross-reference
interchangeable
MR52Interchangeable
interchangeable cross-reference
interchangeable
MR50Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51961-39?
MS51961-39 is a BEARING,ROLLER,NEEDLE.
What parts can replace MS51961-39?
There are 17 known substitutes for MS51961-39: FE21500, N5507, N10507 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51961-39?
MS51961-39 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-901-2128. 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