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R4 — REDUCING WASHER,KNOCKOUT

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

R4: REDUCING WASHER,KNOCKOUT.

The REDUCING WASHER,KNOCKOUT is a the manufacturer industrial component. Key specifications include lever: INCLUDED, material: STEEL INNER RING, bore_shape: STRAIGHT, chain_size: 0.500 INCHES NOMINAL IN, design_type: NONREUSABLE, lever_length: 14.000 INCHES MINIMUM AND 19.000 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-159-9239, 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
R4
NSN: 3110-00-159-9239
NIINs: 001599239, 002500770, 002632955, 002657774, 002941410, 004138521, 005543247, 005543440, 005967051, 007223595, 007534402, 008356048, 012560278, 015733623
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 43334 — GENERAL MOTORS CORP DELCO MORAINE NDH DIV (USA)
SPECIFICATIONS
leverINCLUDED
materialSTEEL INNER RING
bore_shapeSTRAIGHT
chain_size0.500 INCHES NOMINAL IN
design_typeNONREUSABLE
cam_quantity2
lever_length14.000 INCHES MINIMUM AND 19.000 INCHES MAXIMUM IN
body_diameter3.062 INCHES MINIMUM AND 3.094 INCHES MAXIMUM IN
bore_diameter30.0 MILLIMETERS NOMINAL MM
face_materialRUBBER SYNTHETIC
hole_diameter0.440 INCHES NOMINAL IN
mounting_typeFLOOR
NSN3110-00-159-9239
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: R4 · 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
•
RETAINER FABRICATION METHOD: PRESSED
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE
•
OVERALL OUTSIDE DIAMETER: 0.6250 INCHES NOMINAL IN
•
BORE SHAPE: STRAIGHT
•
LOAD DIRECTION: RADIAL
TECHNICAL CHARACTERISTICS
RETAINER FABRICATION METHODPRESSED
INTERNAL FIT-UP DESIGNATIONSTANDARD
SURFACE FINISHGROUND
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
OVERALL WIDTH0.1960 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER0.6250 INCHES NOMINAL IN
BORE SHAPESTRAIGHT
LOAD DIRECTIONRADIAL
STANDARD TOLERANCE DESIGNATIONABEC NO.3
BORE DIAMETER0.2500 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 8
SSR4RA3P15L01Reference document
Same NSN cross-reference
Reference document — Secondary reference
R4XR1JReference document
Same NSN cross-reference
Reference document — Secondary reference
3110001599239Reference document
Same NSN cross-reference
Reference document — Informative reference only
SSR4XR3JReference document
Same NSN cross-reference
Reference document — Secondary reference
8589788Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
702625Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 R4?
R4 is a REDUCING WASHER,KNOCKOUT.
What parts can replace R4?
There are 8 known substitutes for R4: SSR4RA3P15L01, R4XR1J, 3110001599239 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R4?
R4 is cataloged in the U.S. Government catalog under NSN 3110-00-159-9239. 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.