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T660 — BEARING,BALL,DUPLEX

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

T660: BEARING,BALL,DUPLEX.

The BEARING,BALL,DUPLEX is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 2.8748 INCHES MINIMUM AND 2.8750 INCHES MAXIMUM IN, contact_angle: 25.0 DEGREES NOMINAL, overall_width: 0.3700 INCHES MINIMUM AND 0.3800 INCHES MAXIMUM IN, load_direction: RADIAL, surface_finish: GROUND. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-253-2187, 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
T660
NSN: 3110-01-253-2187
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 40920 — MPB CORP DIV TIMKEN SUPER PRECISION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter2.8748 INCHES MINIMUM AND 2.8750 INCHES MAXIMUM IN
contact_angle25.0 DEGREES NOMINAL
overall_width0.3700 INCHES MINIMUM AND 0.3800 INCHES MAXIMUM IN
load_directionRADIAL
surface_finishGROUND
style_designatorCOUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING
surface_treatmentPASSIVATE OVERALL
bearing_preload_rating0.5 POUNDS MINIMUM AND 10.0 POUNDS MAXIMUM LBS
end_item_identificationCOMBAT TALON II
overall_outside_diameter3.2498 INCHES MINIMUM AND 3.2500 INCHES MAXIMUM IN
standard_tolerance_designationABEC NO.5
NSN3110-01-253-2187
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: T660 · 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
•
BEARING PRELOAD RATING: 0.5 POUNDS MINIMUM AND 10.0 POUNDS MAXIMUM LBS
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: COUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING
•
MATERIAL DOCUMENT AND CLASSIFICATION: UNABLE TO DECODE
•
OVERALL OUTSIDE DIAMETER: 3.2498 INCHES MINIMUM AND 3.2500 INCHES MAXIMUM IN
•
CONTACT ANGLE: 25.0 DEGREES NOMINAL
TECHNICAL CHARACTERISTICS
BEARING PRELOAD RATING0.5 POUNDS MINIMUM AND 10.0 POUNDS MAXIMUM LBS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE FINISHGROUND
STYLE DESIGNATORCOUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING
MATERIAL DOCUMENT AND CLASSIFICATIONUNABLE TO DECODE
OVERALL WIDTH0.3700 INCHES MINIMUM AND 0.3800 INCHES MAXIMUM IN
OVERALL OUTSIDE DIAMETER3.2498 INCHES MINIMUM AND 3.2500 INCHES MAXIMUM IN
CONTACT ANGLE25.0 DEGREES NOMINAL
LOAD DIRECTIONRADIAL
SURFACE TREATMENTPASSIVATE OVERALL
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES 2
13534201Reference document
Same NSN cross-reference
Reference document — Secondary reference
2690054-1Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is T660?
T660 is a BEARING,BALL,DUPLEX.
What parts can replace T660?
There are 2 known substitutes for T660: 13534201, 2690054-1. Substitute compatibility should be verified for your specific system.
What is the NSN for T660?
T660 is cataloged in the U.S. Government catalog under NSN 3110-01-253-2187. 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.