The Pulley,groove, cataloged under National Stock Number 3020-01-181-5366, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Harper Engineering Company. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-181-5366 |
| Primary Part Number | BACP30G5 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Harper Engineering Company |
| Status | ACTIVE |
| Groove Shape | U |
| Outside Diameter | 1.015 INCHES MINIMUM AND 1.025 INCHES MAXIMUM IN |
| Pitch Diameter | 0.755 INCHES NOMINAL IN |
| Groove Depth | 0.222 INCHES NOMINAL IN |
| Bore Diameter | 0.189 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Face Width | 0.500 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 |
|---|---|
| BACP30G5 | Harper Engineering Company (USA) |
| BACP30G5 | Timken Aerospace, Inc Dba Torrington Product (USA) |
| Reference | Meaning |
|---|---|
| BACP30G-5 | 3/2 Design control — primary reference U.S. Government activity |
| FL3C6-3FS428 | 5/9 Secondary reference Timken Co Div the Timken Company |
| BACP30G | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 3020-01-181-5366 is a Pulley,groove, manufactured by Harper Engineering Company, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-181-5366 has 2 manufacturer part numbers on file: BACP30G5 (Harper Engineering Company), BACP30G5 (Timken Aerospace, Inc Dba Torrington Product).
Key specifications for BACP30G5: Groove Shape: U; Outside Diameter: 1.015 INCHES MINIMUM AND 1.025 INCHES MAXIMUM IN; Pitch Diameter: 0.755 INCHES NOMINAL IN; Groove Depth: 0.222 INCHES NOMINAL IN. 7 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.