The Bushing,sleeve, cataloged under National Stock Number 3120-01-129-4396, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Rexnord Industries Llc. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3120-01-129-4396 |
| Primary Part Number | 170340 |
| Item Name | Bushing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Rexnord Industries Llc |
| Status | ACTIVE |
| Flange Outside Diameter | 4.0000 INCHES NOMINAL IN |
| Body Outside Diameter | 3.3110 INCHES MINIMUM AND 3.3120 INCHES MAXIMUM IN |
| End to Flange Distance | 0.1875 INCHES NOMINAL IN |
| Body Inside Diameter | 2.8720 INCHES MINIMUM AND 2.8730 INCHES MAXIMUM IN |
| Flange Width | 0.1875 INCHES NOMINAL IN |
| 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 |
|---|---|
| 170340 PRIMARY | Rexnord Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| 3303964 | 3/1 Design control — primary reference Naval Sea Systems Command |
NSN 3120-01-129-4396 is a Bushing,sleeve, manufactured by Rexnord Industries Llc, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-129-4396 has 1 manufacturer part number on file: 170340 (Rexnord Industries Llc).
1 possible match (shared part number, not a government interchangeability claim): 1240-01-655-9022. Verify interchangeability with system specifications before substitution.
Key specifications for 170340: Flange Outside Diameter: 4.0000 INCHES NOMINAL IN; Body Outside Diameter: 3.3110 INCHES MINIMUM AND 3.3120 INCHES MAXIMUM IN; End to Flange Distance: 0.1875 INCHES NOMINAL IN; Overall Length: 2.2180 INCHES MINIMUM AND 2.2190 INCHES MAXIMUM IN. 5 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.