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MR4BC — BEARING,ROLLER,ROD END

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

MR4BC: BEARING,ROLLER,ROD END.

The BEARING,ROLLER,ROD END is a the manufacturer industrial component. Key specifications include material: STEEL INNER RING, shank_style: EXTERNALLY THREADED, thread_class: 3A A, bore_diameter: 0.2500 INCHES NOMINAL IN, alignment_type: RIGID, overall_length: 2.3360 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-183-9894, 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
MR4BC
NSN: 3110-00-183-9894
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 77896 — REXNORD INDUSTRIES, LLC DIV AEROSSPACE BEARING OPERATION (USA)
SPECIFICATIONS
materialSTEEL INNER RING
shank_styleEXTERNALLY THREADED
thread_class3A A
bore_diameter0.2500 INCHES NOMINAL IN
alignment_typeRIGID
overall_length2.3360 INCHES NOMINAL IN
shank_diameter0.3750 INCHES NOMINAL IN
shield_quantity2
inner_ring_width0.5000 INCHES NOMINAL IN
outer_ring_width0.3594 INCHES NOMINAL IN
special_featuresGREASE PLUG ON LOWER HALF OF BEARING,RADIAL PLAY 0.0001 TO 0.0005 IN. IN
style_designatorSINGLE ROW, CONCAVE ROLLERS
NSN3110-00-183-9894
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: MR4BC · 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
•
SHANK DIAMETER: 0.3750 INCHES NOMINAL IN
•
SHANK THREAD LENGTH: 1.0000 INCHES NOMINAL IN
•
LUBRICATION MATERIAL: GREASE
•
OUTER RING WIDTH: 0.3594 INCHES NOMINAL IN
•
SHIELD QUANTITY: 2
•
STYLE DESIGNATOR: SINGLE ROW, CONCAVE ROLLERS
•
OVERALL OUTSIDE DIAMETER: 1.0468 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.3750 INCHES NOMINAL IN
SHANK THREAD LENGTH1.0000 INCHES NOMINAL IN
LUBRICATION MATERIALGREASE
OUTER RING WIDTH0.3594 INCHES NOMINAL IN
SHIELD QUANTITY2
STYLE DESIGNATORSINGLE ROW, CONCAVE ROLLERS
OVERALL LENGTH2.3360 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER1.0468 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
SUBSTITUTES & CROSS-REFERENCES 2
MR4RWReference document
Same NSN cross-reference
Reference document — Secondary reference
GRR4M6-2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MR4BC?
MR4BC is a BEARING,ROLLER,ROD END.
What parts can replace MR4BC?
There are 2 known substitutes for MR4BC: MR4RW, GRR4M6-2. Substitute compatibility should be verified for your specific system.
What is the NSN for MR4BC?
MR4BC is cataloged in the U.S. Government catalog under NSN 3110-00-183-9894. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.