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J3-4 — CAP ASSEMBLY,PROTECTIVE,MUFFLER-

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

J3-4: CAP ASSEMBLY,PROTECTIVE,MUFFLER-.

CAP ASSEMBLY,PROTECTIVE,MUFFLER-. Key specifications include material: STEEL, seal_type: LABYRINTH, block_type: FIXED, cone_width: 1.1930 INCHES NOMINAL IN, base_length: 1.8750 INCHES NOMINAL IN, insert_size: 0.750 IN. DIA IN.

This part is cataloged in the U.S. Government catalog under NSN 3110-00-100-0790, 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
J3-4
NSN: 3110-00-100-0790
NIINs: 001000790, 001865043, 002184274, 007199143, 010590657, 016622639
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 79410 — LIBERTY VENTURES INTI, LLC (USA)
SPECIFICATIONS
materialSTEEL
seal_typeLABYRINTH
block_typeFIXED
cone_width1.1930 INCHES NOMINAL IN
base_length1.8750 INCHES NOMINAL IN
insert_size0.750 IN. DIA IN
bore_diameter1.2500 INCHES NOMINAL IN
housing_width6.5625 INCHES NOMINAL IN
seal_locationBOTH ENDS
step_quantity8
unit_quantity1
alignment_typeSELF-ALIGNING
NSN3110-00-100-0790
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: J3-4 · 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
•
STYLE DESIGNATOR: NORMAL ANGLE
•
CONE CORNER RADIUS: 0.1406 INCHES NOMINAL IN
•
CONE WIDTH: 1.1930 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
BORE DIAMETER: 1.7710 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORNORMAL ANGLE
CONE CORNER RADIUS0.1406 INCHES NOMINAL IN
CONE WIDTH1.1930 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BORE DIAMETER1.7710 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 6
3776Reference document
Same NSN cross-reference
Reference document — Secondary reference
568683Reference document
Same NSN cross-reference
Reference document — Secondary reference
62AX325Reference document
Same NSN cross-reference
Reference document — Secondary reference
92545Reference document
Same NSN cross-reference
Reference document — Secondary reference
K3776Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
158495Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is J3-4?
J3-4 is a CAP ASSEMBLY,PROTECTIVE,MUFFLER-.
What parts can replace J3-4?
There are 6 known substitutes for J3-4: 3776, 568683, 62AX325 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for J3-4?
J3-4 is cataloged in the U.S. Government catalog under NSN 3110-00-100-0790. This indicates validated use in U.S. government and defense supply chains.
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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.