The Bearing,ball,annular, cataloged under National Stock Number 3110-00-652-0621, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is General Motors Corp. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-652-0621 |
| Primary Part Number | 77R18X1U |
| Item Name | Bearing,ball,annular |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | General Motors Corp |
| Status | ACTIVE |
| Retainer Fabrication Method | PRESSED |
| Lubrication Material | OIL |
| Internal Fit-Up Designation | STANDARD |
| Surface Finish | GROUND |
| Shield Quantity | 2 |
| Style Designator | NON-LOADING GROOVE, NON-SEPARABLE |
| Overall Outside Diameter | 2.1250 INCHES NOMINAL IN |
| Bore Shape | STRAIGHT |
| Departure From Cited Designator | AS MODIFIED BY OVERALL WIDTH,AS MODIFIED BY SHIELD QUANTITY,AS MODIFIED BY LUBRICATION MATERIAL |
| Nondefinitive Spec/std Data | 115 TYPE AND 00 GRADE |
| Load Direction | RADIAL |
| Standard Tolerance Designation | ABEC NO.1 |
| Bore Diameter | 1.1250 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Lubrication Material Document and Classification | MIL-L-7870 MIL SPEC SINGLE MATERIAL RESPONSE |
| 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 |
|---|---|
| 77R18X1U PRIMARY | General Motors Corp (USA) |
| Reference | Meaning |
|---|---|
| 77R18X1U | 5/9 Secondary reference General Motors Corp Delco Moraine Ndh Div |
| FFB171 | 4/1 Identification reference U.S. Government activity |
NSN 3110-00-652-0621 is a Bearing,ball,annular, manufactured by General Motors Corp, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-652-0621 has 1 manufacturer part number on file: 77R18X1U (General Motors Corp).
Key specifications for 77R18X1U: Retainer Fabrication Method: PRESSED; Lubrication Material: OIL; Internal Fit-Up Designation: STANDARD; Surface Finish: GROUND. 15 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.