The Bearing,sleeve, cataloged under National Stock Number 3120-01-286-8029, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Roller Bearing Company of America, Inc.. Government technical data includes 29 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-286-8029 |
| Primary Part Number | HS5445-1 |
| Item Name | Bearing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Roller Bearing Company of America, Inc. |
| Status | ACTIVE |
| Corner Shape | SQUARE INSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT 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 RIGHT END SURFACE OF LEFT FLANGE |
| Flange Outside Diameter | 1.8550 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN |
| Body Outside Diameter | 1.3268 INCHES MINIMUM AND 1.3271 INCHES MAXIMUM IN |
| 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 LEFT FLANGE |
| 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 |
| Surface Treatment | PASSIVATE RIGHT END SURFACE OF BODY |
| Surface Treatment | PASSIVATE LEFT END SURFACE OF BODY AND FLANGE |
| Surface Treatment | PASSIVATE OUTSIDE DIAMETER SURFACE OF FLANGE |
| Surface Treatment | PASSIVATE RIGHT END SURFACE OF LEFT FLANGE |
| Flange Width | 0.0890 INCHES MINIMUM AND 0.0940 INCHES MAXIMUM IN |
| Material | STEEL COMP 630 OUTSIDE DIAMETER SURFACE OF FLANGE |
| Material | STEEL COMP 630 LEFT END SURFACE OF BODY AND FLANGE |
| Material | STEEL COMP 630 RIGHT END SURFACE OF BODY |
| Material | STEEL COMP 630 OUTSIDE DIAMETER SURFACE OF BODY |
| Material | STEEL COMP 630 RIGHT END SURFACE OF LEFT FLANGE |
| 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 |
|---|---|
| HS5445-1 PRIMARY | Roller Bearing Company of America, Inc. (USA) |
| Reference | Meaning |
|---|---|
| HS5445-1 | 7/2 Vendor item drawing reference The Boeing Company |
| HS5445-1 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
NSN 3120-01-286-8029 is a Bearing,sleeve, manufactured by Roller Bearing Company of America, Inc., classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-286-8029 has 1 manufacturer part number on file: HS5445-1 (Roller Bearing Company of America, Inc.).
Key specifications for HS5445-1: Corner Shape: SQUARE INSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE LEFT CORNER; Corner Shape: SQUARE INSIDE LEFT CORNER. 29 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.