The Cup,tapered Roller Bearing, cataloged under National Stock Number 3110-00-142-4397, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Federal-Mogul Corp Government Sales Dept. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-142-4397 |
| Primary Part Number | BT552B |
| Item Name | Cup,tapered Roller Bearing |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Federal-Mogul Corp Government Sales Dept |
| Status | ACTIVE |
| Flange Outside Diameter | 5.1250 INCHES NOMINAL IN |
| Style Designator | NORMAL ANGLE, FLANGED |
| Backface Corner Radius | 0.1250 INCHES NOMINAL IN |
| Flange Width | 0.2500 INCHES NOMINAL IN |
| Outer Ring Outside Diameter | 4.8750 INCHES NOMINAL IN |
| Standard Tolerance Designation | AFBMA CLASS 2 |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 552B | The Timken Company (FRA) |
| BT552B PRIMARY | Federal-Mogul Corp Government Sales Dept (USA) |
| 552B PRIMARY | Federal-Mogul Corp Government Sales Dept (USA) |
| K552B | Skf France (FRA) |
| 552B | Rbc Bearings Incorporated Div West Trenton Division (USA) |
| 552B | The Timken Corporation (USA) |
| Reference | Meaning |
|---|---|
| 552B | 5/9 Secondary reference Giddings and Lewis Inc Automation Technology Div |
| 552B | 5/9 Secondary reference Tyson Bearing Co Div Skf Industries Inc |
| 64AX170 | 5/9 Secondary reference Mack Trucks Inc |
NSN 3110-00-142-4397 is a Cup,tapered Roller Bearing, manufactured by Federal-Mogul Corp Government Sales Dept, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-142-4397 has 6 manufacturer part numbers on file: 552B (The Timken Company), BT552B (Federal-Mogul Corp Government Sales Dept), 552B (Federal-Mogul Corp Government Sales Dept), K552B (Skf France), 552B (Rbc Bearings Incorporated Div West Trenton Division) and 1 more.
1 possible match (shared part number, not a government interchangeability claim): 5930-00-407-4181. Verify interchangeability with system specifications before substitution.
Key specifications for BT552B: Flange Outside Diameter: 5.1250 INCHES NOMINAL IN; Style Designator: NORMAL ANGLE, FLANGED; Overall Width: 1.1875 INCHES NOMINAL IN; Backface Corner Radius: 0.1250 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.