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Technical Data Sheet
PartsTable / COMPONENT / M17931-C020
M17931-C020 ✓ 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,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC SEAL, bore_shape: STRAIGHT, bore_diameter: 2.7557 INCHES MINIMUM AND 2.7559 INCHES MAXIMUM IN, overall_width: 2.4980 INCHES MINIMUM AND 2.5000 INCHES MAXIMUM IN, load_direction: RADIAL, surface_finish: GROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-991-0949, 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
M17931-C020
NSN: 3110-00-991-0949
FSC: 3110
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialRUBBER SYNTHETIC SEAL
bore_shapeSTRAIGHT
bore_diameter2.7557 INCHES MINIMUM AND 2.7559 INCHES MAXIMUM IN
overall_width2.4980 INCHES MINIMUM AND 2.5000 INCHES MAXIMUM IN
seal_quantity2
load_directionRADIAL
surface_finishGROUND
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
bearing_seal_typeLIPS TURNED OUTWARDLY
internal_clearance0.0008 INCHES MINIMUM RADIAL AND 0.0012 INCHES MAXIMUM RADIAL IN
lubrication_materialGREASE
overall_outside_diameter5.9053 INCHES MINIMUM AND 5.9055 INCHES MAXIMUM IN
NSN3110-00-991-0949
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: M17931-C020 · 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: 5.9053 INCHES MINIMUM AND 5.9055 INCHES MAXIMUM IN
•
BORE DIAMETER: 2.7557 INCHES MINIMUM AND 2.7559 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OUTER RING
•
LUBRICATION MATERIAL: GREASE
•
INTERNAL FIT-UP DESIGNATION: TIGHT
•
LOAD DIRECTION: RADIAL
•
INTERNAL CLEARANCE: 0.0008 INCHES MINIMUM RADIAL AND 0.0012 INCHES MAXIMUM RADIAL IN
•
SEAL QUANTITY: 2
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL OUTSIDE DIAMETER5.9053 INCHES MINIMUM AND 5.9055 INCHES MAXIMUM IN
BORE DIAMETER2.7557 INCHES MINIMUM AND 2.7559 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OUTER RING
LUBRICATION MATERIALGREASE
INTERNAL FIT-UP DESIGNATIONTIGHT
LOAD DIRECTIONRADIAL
INTERNAL CLEARANCE0.0008 INCHES MINIMUM RADIAL AND 0.0012 INCHES MAXIMUM RADIAL IN
SEAL QUANTITY2
BORE SHAPESTRAIGHT
BEARING SEAL TYPELIPS TURNED OUTWARDLY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
28832-1Interchangeable
interchangeable cross-reference
interchangeable
28832Interchangeable
interchangeable cross-reference
interchangeable
MILB17931Interchangeable
Same NIIN cross-reference
interchangeable
D72047PC91Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M17931-C020?
M17931-C020 is a BEARING,BALL,ANNULAR.
What parts can replace M17931-C020?
There are 4 known substitutes for M17931-C020: 28832-1, 28832, MILB17931 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M17931-C020?
M17931-C020 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-991-0949. 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