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1389379 — PLATE,RETAINING,BEARING

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

1389379: PLATE,RETAINING,BEARING.

The PLATE,RETAINING,BEARING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, outside_diameter: 5.125 INCHES NOMINAL IN, aperture_diameter: 2.813 INCHES NOMINAL IN, surface_treatment: CADMIUM AND CHROMATE OR CADMIUM AND PHOSPHATE OVERALL, mounting_hole_type: ROUND, THREADED. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-186-9608, 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
1389379
NSN: 3110-01-186-9608
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 75477 — FM AF, LLC DBA AMERICAN FAN COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
outside_diameter5.125 INCHES NOMINAL IN
aperture_diameter2.813 INCHES NOMINAL IN
surface_treatmentCADMIUM AND CHROMATE OR CADMIUM AND PHOSPHATE OVERALL
mounting_hole_typeROUND, THREADED
bolt_circle_hole_quantity2
NSN3110-01-186-9608
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 1389379 · 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
•
BOLT CIRCLE HOLE QUANTITY: 2
•
MOUNTING HOLE TYPE: ROUND, THREADED
•
OUTSIDE DIAMETER: 5.125 INCHES NOMINAL IN
•
APERTURE DIAMETER: 2.813 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OR CADMIUM AND PHOSPHATE OVERALL
•
MATERIAL: STEEL COMP 303 OVERALL
TECHNICAL CHARACTERISTICS
BOLT CIRCLE HOLE QUANTITY2
MOUNTING HOLE TYPEROUND, THREADED
OUTSIDE DIAMETER5.125 INCHES NOMINAL IN
APERTURE DIAMETER2.813 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM AND CHROMATE OR CADMIUM AND PHOSPHATE OVERALL
MATERIALSTEEL COMP 303 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
FF12989 PIECE 18Reference document
Same NSN cross-reference
Reference document — Secondary reference
139373-1Reference 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 1389379?
1389379 is a PLATE,RETAINING,BEARING.
What parts can replace 1389379?
There are 2 known substitutes for 1389379: FF12989 PIECE 18, 139373-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 1389379?
1389379 is cataloged in the U.S. Government catalog under NSN 3110-01-186-9608. 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.