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120S4 — BEARING,BALL,ANNULAR

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

120S4: BEARING,BALL,ANNULAR.

The BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL BALL, bore_shape: STRAIGHT, bore_diameter: 3.94975 INCHES MINIMUM AND 3.95006 INCHES MAXIMUM IN, overall_width: 0.7824 INCHES MINIMUM AND 0.7874 INCHES MAXIMUM IN, load_direction: RADIAL, surface_finish: GROUND. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-293-9130, 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
120S4
NSN: 3110-00-293-9130
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 38443 — SKF USA INC. (USA)
SPECIFICATIONS
materialSTEEL BALL
bore_shapeSTRAIGHT
bore_diameter3.94975 INCHES MINIMUM AND 3.95006 INCHES MAXIMUM IN
overall_width0.7824 INCHES MINIMUM AND 0.7874 INCHES MAXIMUM IN
load_directionRADIAL
surface_finishGROUND
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
overall_outside_diameter6.4957 INCHES MINIMUM AND 6.4961 INCHES MAXIMUM IN
internal_fit-up_designationSTANDARD
retainer_fabrication_methodMACHINED
NSN3110-00-293-9130
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 120S4 · 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: MACHINED
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE
•
OVERALL OUTSIDE DIAMETER: 6.4957 INCHES MINIMUM AND 6.4961 INCHES MAXIMUM IN
•
BORE SHAPE: STRAIGHT
•
LOAD DIRECTION: RADIAL
TECHNICAL CHARACTERISTICS
RETAINER FABRICATION METHODMACHINED
INTERNAL FIT-UP DESIGNATIONSTANDARD
SURFACE FINISHGROUND
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
OVERALL WIDTH0.7824 INCHES MINIMUM AND 0.7874 INCHES MAXIMUM IN
OVERALL OUTSIDE DIAMETER6.4957 INCHES MINIMUM AND 6.4961 INCHES MAXIMUM IN
BORE SHAPESTRAIGHT
LOAD DIRECTIONRADIAL
BORE DIAMETER3.94975 INCHES MINIMUM AND 3.95006 INCHES MAXIMUM IN
MATERIALSTEEL OUTER RING
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES 3
D2-33745Reference document
Same NSN cross-reference
Reference document — Secondary reference
PWA8180-14Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
6320-58Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 120S4?
120S4 is a BEARING,BALL,ANNULAR.
What parts can replace 120S4?
There are 3 known substitutes for 120S4: D2-33745, PWA8180-14, 6320-58. Substitute compatibility should be verified for your specific system.
What is the NSN for 120S4?
120S4 is cataloged in the U.S. Government catalog under NSN 3110-00-293-9130. 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.