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57155K304 — BEARING,BALL,ANNULAR

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

57155K304: BEARING,BALL,ANNULAR.

The BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL COMP 440C OVERALL, bore_diameter: 0.250 INCHES NOMINAL IN, special_features: OPEN FLANGED BALL BEARING TYPE, end_item_identification: KC-46A SE A, overall_outside_diameter: 0.50 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: BEARING,BALL,ANNULA. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-659-8726, 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
57155K304
NSN: 3110-01-659-8726
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL COMP 440C OVERALL
bore_diameter0.250 INCHES NOMINAL IN
special_featuresOPEN FLANGED BALL BEARING TYPE
end_item_identificationKC-46A SE A
overall_outside_diameter0.50 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyBEARING,BALL,ANNULA
NSN3110-01-659-8726
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 57155K304 · 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: 0.50 INCHES NOMINAL IN
•
BORE DIAMETER: 0.250 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 440C OVERALL
TECHNICAL CHARACTERISTICS
OVERALL OUTSIDE DIAMETER0.50 INCHES NOMINAL IN
SPECIAL FEATURESOPEN FLANGED BALL BEARING TYPE
PART NAME ASSIGNED BY CONTROLLING AGENCYBEARING,BALL,ANNULA
END ITEM IDENTIFICATIONKC-46A SE A
BORE DIAMETER0.250 INCHES NOMINAL IN
MATERIALSTEEL COMP 440C 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

No substitute or cross-reference records for this part.

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 57155K304?
57155K304 is a BEARING,BALL,ANNULAR.
What is the NSN for 57155K304?
57155K304 is cataloged in the U.S. Government catalog under NSN 3110-01-659-8726. 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.