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90381-90744SPACERY2S90744 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

90381-90744SPACERY2S90744: BEARING,ROLLER,TAPERED.

The BEARING,ROLLER,TAPERED is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL OVERALL, cup_width: 1.2500 INCHES NOMINAL IN, cone_width: 1.8125 INCHES NOMINAL IN, bore_diameter: 3.8125 INCHES NOMINAL IN, overall_width: 2.0000 INCHES NOMINAL IN, standout_width: 0.7500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-811-0887, 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
90381-90744SPACERY2S90744
NSN: 3110-00-811-0887
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width1.2500 INCHES NOMINAL IN
cone_width1.8125 INCHES NOMINAL IN
bore_diameter3.8125 INCHES NOMINAL IN
overall_width2.0000 INCHES NOMINAL IN
standout_width0.7500 INCHES NOMINAL IN
special_featuresEIGHT OIL HOLES 0.750 IN. DIA. EQUALLY SPACED IN CENTER OF CUP SPACER,COMPLETE BEARING WITH CUP SPACER Y2S90744,BENCH LATERAL 4.000 IN. IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.1400 INCHES NOMINAL IN
backface_corner_radius0.1250 INCHES NOMINAL IN
overall_outside_diameter7.4375 INCHES NOMINAL IN
retainer_fabrication_methodPRESSED
NSN3110-00-811-0887
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 90381-90744SPACERY2S90744 · 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
•
CUP WIDTH: 1.2500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 7.4375 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.7500 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
RETAINER FABRICATION METHODPRESSED
CUP WIDTH1.2500 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
OVERALL WIDTH2.0000 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER7.4375 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
STANDOUT WIDTH0.7500 INCHES NOMINAL IN
CONE WIDTH1.8125 INCHES NOMINAL IN
SPECIAL FEATURESEIGHT OIL HOLES 0.750 IN. DIA. EQUALLY SPACED IN CENTER OF CUP SPACER,COMPLETE BEARING WITH CUP SPACER Y2S90744,BENCH LATERAL 4.000 IN. IN
SUBSTITUTES & CROSS-REFERENCES 2
B33644Reference document
Same NSN cross-reference
Reference document — Secondary reference
M2464Reference 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 90381-90744SPACERY2S90744?
90381-90744SPACERY2S90744 is a BEARING,ROLLER,TAPERED.
What parts can replace 90381-90744SPACERY2S90744?
There are 2 known substitutes for 90381-90744SPACERY2S90744: B33644, M2464. Substitute compatibility should be verified for your specific system.
What is the NSN for 90381-90744SPACERY2S90744?
90381-90744SPACERY2S90744 is cataloged in the U.S. Government catalog under NSN 3110-00-811-0887. 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.