The Bearing,sleeve, cataloged under National Stock Number 3120-01-044-8712, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Altra Industrial Motion Corp.. Government technical data includes 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-044-8712 |
| Primary Part Number | B1821-12 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Altra Industrial Motion Corp. |
| Status | ACTIVE |
| Corner Shape | SQUARE ALL CORNERS |
| Body Outside Diameter | 1.3135 INCHES MINIMUM AND 1.3155 INCHES MAXIMUM IN |
| Style Designator | SOLID, PLAIN, NO OUTSIDE FLANGES |
| Material Document and Classification | MIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Material Document and Classification | MIL-L-6085 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-L-11773 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-L-15016, SYMBOL 2190 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION |
| Body Inside Diameter | 1.1260 INCHES MINIMUM AND 1.1280 INCHES MAXIMUM IN |
| Material | COPPER ALLOY OVERALL |
| Material | OIL LUBRICATING LUBRICATION |
| 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 |
|---|---|
| B1821-12 | Altra Industrial Motion Corp. (USA) |
| Reference | Meaning |
|---|---|
| 12381009-14 | 5/9 Secondary reference U.S. Government activity |
| 12381009-14 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 12381009-14 | 3/9 Design control — primary reference Gulf Coast Holdings, Inc Dba Unidynamics |
NSN 3120-01-044-8712 is a Bearing,sleeve, manufactured by Altra Industrial Motion Corp., classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-044-8712 has 1 manufacturer part number on file: B1821-12 (Altra Industrial Motion Corp.).
Key specifications for B1821-12: Corner Shape: SQUARE ALL CORNERS; Body Outside Diameter: 1.3135 INCHES MINIMUM AND 1.3155 INCHES MAXIMUM IN; Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES; Material Document and Classification: MIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 8 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.