The Bearing,sleeve, cataloged under National Stock Number 3120-00-845-9178, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Stromberg-Carlson Corp a Plessey Telecommunications Co. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3120-00-845-9178 |
| Primary Part Number | 540052-021 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Stromberg-Carlson Corp a Plessey Telecommunications Co |
| Status | ACTIVE |
| Flange Outside Diameter | 0.3075 INCHES MINIMUM AND 0.3175 INCHES MAXIMUM IN |
| Body Outside Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Material Document and Classification | MIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 1 TYPE AND A COMPOSITION |
| Flange Width | 0.0312 INCHES NOMINAL IN |
| Material | LUBRICANT LUBRICATION |
| Material | COPPER ALLOY 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 |
|---|---|
| 540052-021 | Bae Systems Information and Electronic Systems Integration Inc. Div Bae Systems Information & Electronic Systems Integration Inc (USA) |
| 540052-021 PRIMARY | Stromberg-Carlson Corp a Plessey Telecommunications Co (USA) |
| F214-1 PRIMARY | Chrysler Corp Amplex Div (USA) |
| F214-1 | Chrysler Realty Company Llc Dba Daimler Chrysler (USA) |
| Reference | Meaning |
|---|---|
| MILB5687 | 4/1 Identification reference U.S. Government activity |
NSN 3120-00-845-9178 is a Bearing,sleeve, manufactured by Stromberg-Carlson Corp a Plessey Telecommunications Co, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-00-845-9178 has 4 manufacturer part numbers on file: 540052-021 (Bae Systems Information and Electronic Systems Integration Inc. Div Bae Systems Information & Electronic Systems Integration Inc), 540052-021 (Stromberg-Carlson Corp a Plessey Telecommunications Co), F214-1 (Chrysler Corp Amplex Div), F214-1 (Chrysler Realty Company Llc Dba Daimler Chrysler).
1 possible match (shared part number, not a government interchangeability claim): 9510-01-674-0708. Verify interchangeability with system specifications before substitution.
Key specifications for 540052-021: Flange Outside Diameter: 0.3075 INCHES MINIMUM AND 0.3175 INCHES MAXIMUM IN; Body Outside Diameter: 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN; Style Designator: SOLID, EXTERNAL FLANGE ONE END; Material Document and Classification: MIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 9 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.