The Bearing,sleeve, cataloged under National Stock Number 3120-00-450-1905, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Prestolite Electric Inc. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3120-00-450-1905 |
| Primary Part Number | MEL-50 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Prestolite Electric Inc |
| Status | ACTIVE |
| Corner Shape | SQUARE ALL CORNERS |
| Flange Outside Diameter | 0.8100 INCHES NOMINAL IN |
| Body Outside Diameter | 0.6900 INCHES NOMINAL IN |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Body Inside Diameter | 0.5625 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 |
|---|---|
| MEL-50 PRIMARY | Prestolite Electric Inc (USA) |
| Reference | Meaning |
|---|---|
| MEL50 | 5/9 Secondary reference Prestolite Electric Inc |
| 3120PL0650811 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 3120004501905 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| MEL50 | 5/9 Secondary reference Prestolite Wire Co an Eltra Co |
NSN 3120-00-450-1905 is a Bearing,sleeve, manufactured by Prestolite Electric Inc, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-00-450-1905 has 1 manufacturer part number on file: MEL-50 (Prestolite Electric Inc).
1 possible match (shared part number, not a government interchangeability claim): 4520-01-529-1089. Verify interchangeability with system specifications before substitution.
Key specifications for MEL-50: Corner Shape: SQUARE ALL CORNERS; Flange Outside Diameter: 0.8100 INCHES NOMINAL IN; Body Outside Diameter: 0.6900 INCHES NOMINAL IN; Style Designator: SOLID, EXTERNAL FLANGE ONE END. 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.