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Technical Data Sheet
PartsTable / COMPONENT / 8587398
8587398 ✓ 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,AIRFRAME is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 1.3125 INCHES NOMINAL IN, load_direction: RADIAL, inner_ring_width: 0.2810 INCHES NOMINAL IN, outer_ring_width: 0.2500 INCHES NOMINAL IN, style_designator: SINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-142-4332, 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
8587398
NSN: 3110-00-142-4332
FSC: 3110
CAGE: 19200 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter1.3125 INCHES NOMINAL IN
load_directionRADIAL
inner_ring_width0.2810 INCHES NOMINAL IN
outer_ring_width0.2500 INCHES NOMINAL IN
style_designatorSINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
overall_outside_diameter1.7500 INCHES NOMINAL IN
lubrication_material_document_and_classificationMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
NSN3110-00-142-4332
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 8587398 · 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
•
LOAD DIRECTION: RADIAL
•
INNER RING WIDTH: 0.2810 INCHES NOMINAL IN
•
OUTER RING WIDTH: 0.2500 INCHES NOMINAL IN
•
OVERALL OUTSIDE DIAMETER: 1.7500 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
•
STYLE DESIGNATOR: SINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
•
BORE DIAMETER: 1.3125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
LOAD DIRECTIONRADIAL
INNER RING WIDTH0.2810 INCHES NOMINAL IN
OUTER RING WIDTH0.2500 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER1.7500 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
STYLE DESIGNATORSINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
BORE DIAMETER1.3125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
B542Interchangeable
interchangeable cross-reference
interchangeable
B54SC2Interchangeable
interchangeable cross-reference
interchangeable
BW54-2Interchangeable
interchangeable cross-reference
interchangeable
STAMP PAD INKS, RED (PINT)Interchangeable
interchangeable cross-reference
interchangeable
STAMP PAD INKInterchangeable
interchangeable cross-reference
interchangeable
0024 REDInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8587398?
8587398 is a BEARING,BALL,AIRFRAME.
What parts can replace 8587398?
There are 21 known substitutes for 8587398: B542, B54SC2, BW54-2 and 18 more. Substitute compatibility should be verified for your specific system.
Is 8587398 still available?
8587398 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026