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Technical Data Sheet
PartsTable / COMPONENT / 20504-39
20504-39 ✓ 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,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_shape: STRAIGHT, bore_diameter: 25.00 MILLIMETERS NOMINAL MM, load_direction: RADIAL, surface_finish: GROUND, inner_ring_width: 0.6000 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-4242, 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
20504-39
NSN: 3110-00-156-4242
FSC: 3110
CAGE: 83298 — ALLIED SIGNAL INC AEROSPACE EQUIPMENT SYSTEMS EATONTOWN SITE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
bore_diameter25.00 MILLIMETERS NOMINAL MM
seal_quantity1
load_directionRADIAL
surface_finishGROUND
inner_ring_width0.6000 INCHES NOMINAL IN
outer_ring_width0.6100 INCHES NOMINAL IN
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
bearing_seal_typeCONTACT
lubrication_materialGREASE
overall_outside_diameter52.00 MILLIMETERS NOMINAL MM
NSN3110-00-156-4242
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 20504-39 · 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: ABEC NO.1
•
LUBRICATION MATERIAL: GREASE
•
OUTER RING WIDTH: 0.6100 INCHES NOMINAL IN
•
BEARING SEAL TYPE: CONTACT
•
BORE SHAPE: STRAIGHT
•
SURFACE FINISH: GROUND
•
SEAL QUANTITY: 1
•
INNER RING WIDTH: 0.6000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STANDARD TOLERANCE DESIGNATIONABEC NO.1
LUBRICATION MATERIALGREASE
OUTER RING WIDTH0.6100 INCHES NOMINAL IN
BEARING SEAL TYPECONTACT
BORE SHAPESTRAIGHT
SURFACE FINISHGROUND
SEAL QUANTITY1
INNER RING WIDTH0.6000 INCHES NOMINAL IN
LOAD DIRECTIONRADIAL
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-18709 MIL SPEC SINGLE MATERIAL RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
A-A-413Interchangeable
interchangeable cross-reference
interchangeable
31330Interchangeable
interchangeable cross-reference
interchangeable
24187Interchangeable
interchangeable cross-reference
interchangeable
7274Interchangeable
interchangeable cross-reference
interchangeable
072744Interchangeable
interchangeable cross-reference
interchangeable
A-2322Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20504-39?
20504-39 is a BEARING,BALL,ANNULAR.
What parts can replace 20504-39?
There are 21 known substitutes for 20504-39: A-A-413, 31330, 24187 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20504-39?
20504-39 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-4242. 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