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Technical Data Sheet
PartsTable / COMPONENT / A-A-318
A-A-318 ✓ 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,ROLLER,CYLINDRICAL is a the manufacturer industrial component. Key specifications include color: WHITE, design_type: CYLINDRICAL, dustless_feature: PROVIDED, overall_diameter: 0.375 INCHES NOMINAL IN, unit_package_type: BOX, unit_package_quantity: 144. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-155-6534, 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
A-A-318
NSN: 3110-00-155-6534
FSC: 3110
CAGE: 60380 — TIMKEN AEROSPACE, INC DBA TORRINGTON PRODUCT (USA)
SPECIFICATIONS
colorWHITE
design_typeCYLINDRICAL
dustless_featurePROVIDED
overall_diameter0.375 INCHES NOMINAL IN
unit_package_typeBOX
unit_package_quantity144
part_name_assigned_by_controlling_agencyCHALK MARKING
NSN3110-00-155-6534
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: A-A-318 · 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
•
STANDARD TOLERANCE DESIGNATION: RBEC NO.1
•
SURFACE FINISH: GROUND
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
STYLE DESIGNATOR: SINGLE ROW, NON-LOCATING, CYLINDRICAL INNER RING, TWO LIP OUTER RING, SEPARABLE
•
MATERIAL: STEEL OUTER RING
TECHNICAL CHARACTERISTICS (FLIS)
STANDARD TOLERANCE DESIGNATIONRBEC NO.1
SURFACE FINISHGROUND
INTERNAL FIT-UP DESIGNATIONSTANDARD
STYLE DESIGNATORSINGLE ROW, NON-LOCATING, CYLINDRICAL INNER RING, TWO LIP OUTER RING, SEPARABLE
MATERIALSTEEL OUTER RING
MATERIALSTEEL INNER RING
MATERIALSTEEL ROLLER
MATERIALSTEEL OR COPPER ALLOY RETAINER
BORE SHAPESTRAIGHT
BORE DIAMETER90.0 MILLIMETERS NOMINAL MM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
33144Interchangeable
interchangeable cross-reference
interchangeable
SS-C-255Interchangeable
interchangeable cross-reference
interchangeable
31144Interchangeable
interchangeable cross-reference
interchangeable
CD318Interchangeable
interchangeable cross-reference
interchangeable
11135Interchangeable
interchangeable cross-reference
interchangeable
12707Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-A-318?
A-A-318 is a BEARING,ROLLER,CYLINDRICAL.
What parts can replace A-A-318?
There are 13 known substitutes for A-A-318: 33144, SS-C-255, 31144 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A-A-318?
A-A-318 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-155-6534. 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