The Bearing,sleeve, cataloged under National Stock Number 3120-00-554-0637, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3120-00-554-0637 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Status | ACTIVE |
| Corner Shape | SQUARE INSIDE RIGHT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | CHAMFERED OUTSIDE LEFT CORNER |
| Corner Shape | CHAMFERED OUTSIDE RIGHT CORNER |
| Body Outside Diameter | 2.3770 INCHES MINIMUM AND 2.3780 INCHES MAXIMUM IN |
| Style Designator | SPLIT, PLAIN, NO OUTSIDE FLANGES |
| Material Document and Classification | MIL-B-13506 MIL SPEC SINGLE MATERIAL RESPONSE INNER LAYER |
| Body Inside Diameter | 2.2310 INCHES MINIMUM AND 2.2320 INCHES MAXIMUM IN |
| Antirotation/lubrication Type and Quantity | 2 HOLE |
| Material | COPPER ALLOY SAE 797 INNER LAYER |
| Material | STEEL OUTER LAYER |
| Hole Diameter | 0.3750 INCHES NOMINAL FIRST 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 |
|---|---|
| D579 | 5/9 Secondary reference Koehring Co Lorain Div |
| D579 | 3/9 Design control — primary reference Koehring Cranes and Excavators Inc Sub of Northwest Engineering Co |
NSN 3120-00-554-0637 is a Bearing,sleeve, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5915-01-591-3772. Verify interchangeability with system specifications before substitution.
Key specifications for 3120-00-554-0637: Corner Shape: SQUARE INSIDE RIGHT CORNER; Corner Shape: SQUARE INSIDE LEFT CORNER; Corner Shape: CHAMFERED OUTSIDE LEFT CORNER; Corner Shape: CHAMFERED OUTSIDE RIGHT CORNER. 12 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.