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Technical Data Sheet
PartsTable / COMPONENT / 387A
387A ✓ 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

CONE AND ROLLERS,TAPERED ROLLER. Key specifications include material: STEEL, body_style: STRAIGHT SHAPE, INTERNAL COUPLING, cone_width: 0.8640 INCHES NOMINAL IN, jaw_length: 0.813 INCHES NOMINAL IN, shell_type: SOLID, bore_diameter: 2.2500 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0229, 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
387A
NSN: 3110-00-100-0229
FSC: 3110
CAGE: 12603 — CLARK EQUIPMENT CO (USA)
SPECIFICATIONS
materialSTEEL
body_styleSTRAIGHT SHAPE, INTERNAL COUPLING
cone_width0.8640 INCHES NOMINAL IN
jaw_length0.813 INCHES NOMINAL IN
shell_typeSOLID
bore_diameter2.2500 INCHES NOMINAL IN
overall_length7.281 INCHES NOMINAL IN
shell_materialMETAL
insert_materialPLASTIC ALL MATING ENDS
contact_materialALUMINUM ALLOY ALL MATING ENDS SINGLE CONTACT GROUPING
overall_diameter0.781 INCHES NOMINAL IN
special_featuresBOWED HANDLE STYLE
NSN3110-00-100-0229
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 387A · 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 DIAMETER: 2.2500 INCHES NOMINAL IN
•
CONE WIDTH: 0.8640 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: NORMAL ANGLE
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
CONE CORNER RADIUS: 0.1406 INCHES NOMINAL IN
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER2.2500 INCHES NOMINAL IN
CONE WIDTH0.8640 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STYLE DESIGNATORNORMAL ANGLE
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
CONE CORNER RADIUS0.1406 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
55036-2Interchangeable
interchangeable cross-reference
interchangeable
78584Interchangeable
interchangeable cross-reference
interchangeable
2155153Interchangeable
interchangeable cross-reference
interchangeable
WCDFInterchangeable
interchangeable cross-reference
interchangeable
P7761617G1Interchangeable
interchangeable cross-reference
interchangeable
ML7761617G1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 387A?
387A is a CONE AND ROLLERS,TAPERED ROLLER.
What parts can replace 387A?
There are 28 known substitutes for 387A: 55036-2, 78584, 2155153 and 25 more. Substitute compatibility should be verified for your specific system.
Is 387A still available?
387A is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026