The Ring,bearing,inner, cataloged under National Stock Number 3110-00-183-9756, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Meritor Heavy Vehicle Systems, Llc. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-183-9756 |
| Primary Part Number | 1221E31 |
| Item Name | Ring,bearing,inner |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Meritor Heavy Vehicle Systems, Llc |
| Status | ACTIVE |
| Surface Finish | GROUND |
| Style Designator | SOLID INNER RACE, JOURNAL AND NEEDLE |
| Overall Outside Diameter | 1.2480 INCHES NOMINAL IN |
| Bore Shape | STRAIGHT |
| Standard Tolerance Designation | AFBMA STD TOLERANCES FOR JOURNAL BEARINGS |
| Bore Diameter | 0.9370 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 |
|---|---|
| 1221E31 PRIMARY | Meritor Heavy Vehicle Systems, Llc (USA) |
| RB53052F PRIMARY | Federal-Mogul Corp Government Sales Dept (USA) |
| 2224025 PRIMARY | General Motors Corp (USA) |
| Reference | Meaning |
|---|---|
| 80D5 | 5/9 Secondary reference Diamond Reo Truck Co |
| 2224025 | 5/9 Secondary reference Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
| 2224025 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| V3027 | 5/9 Secondary reference Correct Mfg Corp |
NSN 3110-00-183-9756 is a Ring,bearing,inner, manufactured by Meritor Heavy Vehicle Systems, Llc, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-183-9756 has 3 manufacturer part numbers on file: 1221E31 (Meritor Heavy Vehicle Systems, Llc), RB53052F (Federal-Mogul Corp Government Sales Dept), 2224025 (General Motors Corp).
Key specifications for 1221E31: Surface Finish: GROUND; Style Designator: SOLID INNER RACE, JOURNAL AND NEEDLE; Overall Width: 0.9920 INCHES NOMINAL IN; Overall Outside Diameter: 1.2480 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.