The Bearing,sleeve, cataloged under National Stock Number 3120-01-210-0850, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3120-01-210-0850 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY |
| Surface Finish | 32.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY |
| Corner Shape | SQUARE INSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | ROUND LEFT FLANGE BODY CORNER |
| Flange Outside Diameter | 3.5000 INCHES NOMINAL IN |
| Body Outside Diameter | 1.8750 INCHES NOMINAL IN |
| Material Document and Classification | MIL-M-16576 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 1.2500 INCHES MINIMUM AND 1.2520 INCHES MAXIMUM IN |
| Antirotation/lubrication Type and Quantity | 5 HOLE |
| Flange Width | 0.5000 INCHES NOMINAL IN |
| Material | COPPER ALLOY 903 OVERALL |
| Hole Diameter | 0.3438 INCHES NOMINAL FIRST IN |
| Hole Diameter | 0.4062 INCHES NOMINAL SECOND IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 501-2277641 PC 8 | 3/2 Design control — primary reference U.S. Government activity |
| 1079-501-39 PIECE 8 | 5/9 Secondary reference Huntington Ingalls Incorporated Div Ingalls Shipbuilding |
| SSN593-5011863222 PIECE 8 | 5/9 Secondary reference U.S. Government activity |
| SSN596-501-2277641 | 3/9 Design control — primary reference U.S. Government activity |
NSN 3120-01-210-0850 is a Bearing,sleeve, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-213-8125. Verify interchangeability with system specifications before substitution.
Key specifications for 3120-01-210-0850: Surface Finish: 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY; Surface Finish: 32.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY; Corner Shape: SQUARE INSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE RIGHT CORNER. 17 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.