The Bearing,sleeve, cataloged under National Stock Number 3120-01-286-8030, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is The Boeing Company. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-286-8030 |
| Primary Part Number | HS5445-2 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Corner Shape | SQUARE INSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | UNDERCUT LEFT FLANGE BODY CORNER |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE LEFT END SURFACE OF BODY AND FLANGE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OUTSIDE DIAMETER SURFACE OF BODY |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OUTSIDE DIAMETER SURFACE OF FLANGE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE RIGHT END SURFACE OF BODY |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE RIGHT END SURFACE OF LEFT FLANGE |
| Flange Outside Diameter | 1.8550 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN |
| Body Outside Diameter | 1.3424 INCHES MINIMUM AND 1.3427 INCHES MAXIMUM IN |
| Hardness Rating | 27.0 ROCKWELL C NOMINAL LEFT END SURFACE OF BODY AND FLANGE |
| Hardness Rating | 27.0 ROCKWELL C NOMINAL OUTSIDE DIAMETER SURFACE OF BODY |
| Hardness Rating | 27.0 ROCKWELL C NOMINAL OUTSIDE DIAMETER SURFACE OF FLANGE |
| Hardness Rating | 27.0 ROCKWELL C NOMINAL RIGHT END SURFACE OF BODY |
| Hardness Rating | 27.0 ROCKWELL C NOMINAL RIGHT END SURFACE OF LEFT FLANGE |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Material Document and Classification | AMS5643 ASSN STD SINGLE MATERIAL RESPONSE LEFT END SURFACE OF BODY AND FLANGE |
| Material Document and Classification | AMS5643 ASSN STD SINGLE MATERIAL RESPONSE OUTSIDE DIAMETER SURFACE OF BODY |
| Material Document and Classification | AMS5643 ASSN STD SINGLE MATERIAL RESPONSE OUTSIDE DIAMETER SURFACE OF FLANGE |
| Material Document and Classification | AMS5643 ASSN STD SINGLE MATERIAL RESPONSE RIGHT END SURFACE OF BODY |
| Material Document and Classification | AMS5643 ASSN STD SINGLE MATERIAL RESPONSE RIGHT END SURFACE OF LEFT FLANGE |
| Material Document and Classification | MIL-B-81820 MIL SPEC ALL MATERIAL RESPONSES INSIDE DIAMETER SURFACE OF BODY |
| Body Inside Diameter | 1.1255 INCHES MINIMUM AND 1.1260 INCHES MAXIMUM IN |
| Specification/standard Data | 02731-HS5445 MANUFACTURERS STANDARD |
| Surface Treatment | PASSIVATE RIGHT END SURFACE OF BODY |
| 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 |
|---|---|
| HS5445-2 PRIMARY | The Boeing Company (USA) |
| HS5445-2 | Roller Bearing Company of America, Inc. (USA) |
| Reference | Meaning |
|---|---|
| FBE 18C32MHA | 5/1 Secondary reference Roller Bearing Company of America, Inc. |
| HS5445-2 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
NSN 3120-01-286-8030 is a Bearing,sleeve, manufactured by The Boeing Company, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-286-8030 has 2 manufacturer part numbers on file: HS5445-2 (The Boeing Company), HS5445-2 (Roller Bearing Company of America, Inc.).
Key specifications for HS5445-2: Corner Shape: SQUARE INSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE LEFT CORNER; Corner Shape: SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER. 28 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.