The Bearing,sleeve, cataloged under National Stock Number 3120-01-446-9957, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Bunting Bearings 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-446-9957 |
| Primary Part Number | FF-620-31/64 LG |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Bunting Bearings Corp |
| Status | ACTIVE |
| Corner Shape | SQUARE ALL CORNERS |
| Flange Outside Diameter | 0.9875 INCHES NOMINAL IN |
| Body Outside Diameter | 0.6260 INCHES MINIMUM AND 0.6270 INCHES MAXIMUM IN |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Material Document and Classification | MIL-B-5687, TY 1, COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.5010 INCHES MINIMUM AND 0.5020 INCHES MAXIMUM IN |
| Flange Width | 0.0600 INCHES MINIMUM AND 0.0640 INCHES MAXIMUM IN |
| Material | COPPER ALLOY 841 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 |
|---|---|
| FF-620-31/64 LG PRIMARY | Bunting Bearings Corp (USA) |
| Reference | Meaning |
|---|---|
| 123-4403549 PIECE 5 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 123-4403534 PART 11 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| FF-620-31/64 LG | C/1 Advisory reference — outside the item-of-supply concept Bunting Bearings Llc Dba Bunting Bearings Corp |
| 123-4403533 PART 21 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| FF-620-31/64 LG | 5/9 Secondary reference Bunting Bearings Corp Kalamazoo Plant |
NSN 3120-01-446-9957 is a Bearing,sleeve, manufactured by Bunting Bearings Corp, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-446-9957 has 1 manufacturer part number on file: FF-620-31/64 LG (Bunting Bearings Corp).
Key specifications for FF-620-31/64 LG: Corner Shape: SQUARE ALL CORNERS; Flange Outside Diameter: 0.9875 INCHES NOMINAL IN; Body Outside Diameter: 0.6260 INCHES MINIMUM AND 0.6270 INCHES MAXIMUM IN; Style Designator: SOLID, EXTERNAL FLANGE ONE END. 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.