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051991 — CONE AND ROLLERS,TAPERED ROLLER

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

051991: CONE AND ROLLERS,TAPERED ROLLER.

CONE AND ROLLERS,TAPERED ROLLER. Key specifications include part_name_assigned_by_controlling_agency: STRAP BACKBOARD ONE PIECE 1.75" W X 108" L NYLON WEBBING. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-100-3644, 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
051991
NSN: 3110-00-100-3644
NIINs: 001003644, 015366278
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 89926 — NEW HOLLAND CONSTRUCTION (USA)
SPECIFICATIONS
part_name_assigned_by_controlling_agencySTRAP BACKBOARD ONE PIECE 1.75" W X 108" L NYLON WEBBING
NSN3110-00-100-3644
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 051991 · 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: 1.7500 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
BORE DIAMETER: 1.9375 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
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
STYLE DESIGNATORNORMAL ANGLE
CONE CORNER RADIUS0.1406 INCHES NOMINAL IN
CONE WIDTH1.7500 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BORE DIAMETER1.9375 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 6
178771Reference document
Same NSN cross-reference
Reference document — Secondary reference
312863Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
65390Reference document
Same NSN cross-reference
Reference document — Secondary reference
93245Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
FF-B-187Reference document
Same NSN cross-reference
Reference document — Identification reference
65390TIMReference 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 051991?
051991 is a CONE AND ROLLERS,TAPERED ROLLER.
What parts can replace 051991?
There are 6 known substitutes for 051991: 178771, 312863, 65390 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 051991?
051991 is cataloged in the U.S. Government catalog under NSN 3110-00-100-3644. 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.