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TRB-3446 — SEAT,BEARING

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

TRB-3446: SEAT,BEARING.

The SEAT,BEARING is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 2.1250 INCHES NOMINAL IN, overall_width: 0.0600 INCHES MINIMUM AND 0.0630 INCHES MAXIMUM IN, outside_diameter: 2.8750 INCHES NOMINAL IN, style_designator: FLAT RACE SURFACE. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-021-3801, 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
TRB-3446
NSN: 3110-01-021-3801
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 5XMS1 — JTEKT BEARINGS NORTH AMERICA LLC DIV KBNA - ORD 1 (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter2.1250 INCHES NOMINAL IN
overall_width0.0600 INCHES MINIMUM AND 0.0630 INCHES MAXIMUM IN
outside_diameter2.8750 INCHES NOMINAL IN
style_designatorFLAT RACE SURFACE
NSN3110-01-021-3801
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: TRB-3446 · 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
•
STYLE DESIGNATOR: FLAT RACE SURFACE
•
OUTSIDE DIAMETER: 2.8750 INCHES NOMINAL IN
•
BORE DIAMETER: 2.1250 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFLAT RACE SURFACE
OVERALL WIDTH0.0600 INCHES MINIMUM AND 0.0630 INCHES MAXIMUM IN
OUTSIDE DIAMETER2.8750 INCHES NOMINAL IN
BORE DIAMETER2.1250 INCHES NOMINAL IN
MATERIALSTEEL 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 1
D1230PC36Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is TRB-3446?
TRB-3446 is a SEAT,BEARING.
What parts can replace TRB-3446?
There is 1 known substitute for TRB-3446: D1230PC36. Substitute compatibility should be verified for your specific system.
What is the NSN for TRB-3446?
TRB-3446 is cataloged in the U.S. Government catalog under NSN 3110-01-021-3801. 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.