The Ring,bearing,inner, cataloged under National Stock Number 3110-00-620-0364, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-620-0364 |
| Primary Part Number | 5B1974 |
| Item Name | Ring,bearing,inner |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Surface Finish | GROUND |
| Style Designator | INNER RING, ROLLER, CYLINDRICAL |
| Overall Outside Diameter | 1.6017 INCHES NOMINAL IN |
| Bore Shape | STRAIGHT |
| Standard Tolerance Designation | RBEC NO.1 |
| Bore Diameter | 1.1811 INCHES NOMINAL IN |
| 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 |
|---|---|
| 5B1974 | Caterpillar Inc Div Caterpillar Defense (USA) |
| MA1306 | Federal-Mogul Corp Government Sales Dept (USA) |
| Reference | Meaning |
|---|---|
| 191200 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| A1306 | 5/9 Secondary reference General Motors Corp |
| 191200 | 5/9 Secondary reference General Motors Corp |
| A1306 | 3/9 Design control — primary reference General Motors Corp Delco Moraine Ndh Div |
| A1306 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
NSN 3110-00-620-0364 is a Ring,bearing,inner, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-620-0364 has 2 manufacturer part numbers on file: 5B1974 (Caterpillar Inc Div Caterpillar Defense), MA1306 (Federal-Mogul Corp Government Sales Dept).
3 possible matches (shared part number, not a government interchangeability claim): 6625-00-885-6883, 2310-01-141-3267, 6110-01-365-5629. Verify interchangeability with system specifications before substitution.
Key specifications for 5B1974: Surface Finish: GROUND; Style Designator: INNER RING, ROLLER, CYLINDRICAL; Overall Width: 0.7480 INCHES NOMINAL IN; Overall Outside Diameter: 1.6017 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.