NSN 3110-00-142-4401 — this item is cataloged by the U.S. Government under National Stock Number 3110-00-142-4401. Manufacturer of record part number: 6B124.
Outer Ring Outside Diameter: 3.3464 INCHES NOMINAL IN
Standard Tolerance Designation: AFBMA CLASS 2
Material: STEEL OVERALL
Identification
NSN: 3110-00-142-4401
NIIN: 001424401
FSC: 3110 — Bearings, Antifriction, Unmounted
FSG: 31 — Bearings
Primary part number: 6B124
Manufacturer: Caterpillar Inc Div Caterpillar Defense
General Description
The Cup,tapered Roller Bearing, cataloged under National Stock Number 3110-00-142-4401, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
3110-00-142-4401
Primary Part Number
6B124
Item Name
Cup,tapered Roller Bearing
FSC / FSG
3110 / 31 — Bearings, Antifriction, Unmounted
Manufacturer
Caterpillar Inc Div Caterpillar Defense
Status
ACTIVE
Flange Outside Diameter
3.5339 INCHES NOMINAL IN
Style Designator
NORMAL ANGLE, FLANGED
Backface Corner Radius
0.0625 INCHES NOMINAL IN
Flange Width
0.1875 INCHES NOMINAL IN
Outer Ring Outside Diameter
3.3464 INCHES NOMINAL IN
Standard Tolerance Designation
AFBMA CLASS 2
Material
STEEL OVERALL
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items2
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-00-398-9129354BPOSSIBLE MATCH
PISTON,VALVE
Possible match (shared part number)Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
5331-01-430-8800354-BPOSSIBLE MATCH
O-RING
Possible match (shared part number)Pti Technologies Inc.
NSN 3110-00-142-4401 is a Cup,tapered Roller Bearing, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
What part numbers are listed for NSN 3110-00-142-4401?
NSN 3110-00-142-4401 has 4 manufacturer part numbers on file: 6B124 (Caterpillar Inc Div Caterpillar Defense), BT354B (Federal-Mogul Corp Government Sales Dept), 6B0124 (Caterpillar Inc Div Caterpillar Defense), 354B (The Timken Corporation).
What NSN replaces 3110-00-142-4401?
2 possible matches (shared part number, not a government interchangeability claim): 4820-00-398-9129, 5331-01-430-8800. Verify interchangeability with system specifications before substitution.
What are the specifications of 6B124?
Key specifications for 6B124: Flange Outside Diameter: 3.5339 INCHES NOMINAL IN; Style Designator: NORMAL ANGLE, FLANGED; Overall Width: 0.6875 INCHES NOMINAL IN; Backface Corner Radius: 0.0625 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.
Is NSN 3110-00-142-4401 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.