The Bushing,sleeve, cataloged under National Stock Number 3120-00-357-4373, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-00-357-4373 |
| Item Name | Bushing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Status | ACTIVE |
| Surface Finish | 16.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY |
| Surface Finish | 64.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF FLANGE |
| Corner Shape | SQUARE INSIDE RIGHT CORNER |
| Corner Shape | SQUARE LEFT FLANGE BODY CORNER |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | CHAMFERED OUTSIDE LEFT CORNER |
| Flange Outside Diameter | 0.4760 INCHES MINIMUM AND 0.4860 INCHES MAXIMUM IN |
| Body Outside Diameter | 0.3400 INCHES MINIMUM AND 0.3500 INCHES MAXIMUM IN |
| Hardness Rating | 55.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.2507 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN |
| Antirotation/lubrication Type and Quantity | 4 HOLE AND 2 SLOT |
| Flange Width | 0.1550 INCHES MINIMUM AND 0.1560 INCHES MAXIMUM IN |
| Material | STEEL COMP 440C OVERALL |
| Slot Width | 0.0937 INCHES NOMINAL FIRST IN |
| Slot Length | 0.4810 INCHES NOMINAL FIRST IN |
| Hole Diameter | 0.0700 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 |
|---|---|
| 12664-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3120-00-357-4373 is a Bushing,sleeve, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 5330-00-579-9586, 5910-00-644-0784, 5945-00-779-9199. Verify interchangeability with system specifications before substitution.
Key specifications for 3120-00-357-4373: Surface Finish: 16.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY; Surface Finish: 64.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF FLANGE; Corner Shape: SQUARE INSIDE RIGHT CORNER; Corner Shape: SQUARE LEFT FLANGE BODY CORNER. 20 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.