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Technical Data Sheet
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312AC — Technical Data Sheet

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— · 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,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY TUBING, design_form: STRAIGHT, overall_length: 12.000 INCHES NOMINAL IN, wall_thickness: 0.080 INCHES NOMINAL IN, special_features: CHROME PLATED, mating_end_quantity: 1 SINGLE END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 3110-00-156-6737, 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
312AC
NSN: 3110-00-156-6737
FSC: 3110
CAGE: 43991 — FAG BEARINGS CORPORATION (USA)
SPECIFICATIONS
materialCOPPER ALLOY TUBING
design_formSTRAIGHT
overall_length12.000 INCHES NOMINAL IN
wall_thickness0.080 INCHES NOMINAL IN
special_featuresCHROME PLATED
mating_end_quantity1 SINGLE END
end_connection_styleLAVATORY RISER SINGLE END
tube_outside_diameter0.500 INCHES NOMINAL IN
material_document_and_classificationASTM B68 ASSN STD SINGLE MATERIAL RESPONSE TUBING
NSN3110-00-156-6737
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 312AC · 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
•
BORE SHAPE: STRAIGHT
•
BORE DIAMETER: 12.00 MILLIMETERS NOMINAL MM
•
MATERIAL: STEEL OUTER RING
•
STYLE DESIGNATOR: COUNTERBORED OUTER RING, NON-SEPARABLE
•
LOAD DIRECTION: ANGULAR
TECHNICAL CHARACTERISTICS
OVERALL WIDTH12.00 MILLIMETERS NOMINAL MM
BORE SHAPESTRAIGHT
BORE DIAMETER12.00 MILLIMETERS NOMINAL MM
MATERIALSTEEL OUTER RING
STYLE DESIGNATORCOUNTERBORED OUTER RING, NON-SEPARABLE
MATERIALSTEEL BALL
MATERIALSTEEL INNER RING
LOAD DIRECTIONANGULAR
SURFACE FINISHGROUND
STANDARD TOLERANCE DESIGNATIONABEC NO.1
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
2-03-01InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MILT38381InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A6-333D680InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
200LDInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
FF-B-171InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
87500CE1SA2InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 312AC?
312AC is a BEARING,BALL,ANNULAR.
What parts can replace 312AC?
There are 26 known substitutes for 312AC: 2-03-01, MILT38381, A6-333D680 and 23 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 312AC?
312AC is cataloged in the Federal Logistics Information System under NSN 3110-00-156-6737. 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: September 2026