The Pulley,timing Belt, cataloged under National Stock Number 3020-00-077-0580, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-077-0580 |
| Item Name | Pulley,timing Belt |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Diameter | 1.562 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN |
| Face Pitch Designation | L |
| Face Type | FLAT GROOVED |
| Bore Type | MINIMUM |
| Face Groove/tooth Quantity | 20 |
| Keyway Width | 0.188 INCHES NOMINAL IN |
| Bore Diameter | 1.187 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Face Width | 1.187 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 |
| Reference | Meaning |
|---|---|
| 43440 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-077-0580 is a Pulley,timing Belt, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 5330-00-810-5757, 5950-00-977-1128, 6625-01-496-8462. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-077-0580: Hub Diameter: 1.562 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN; Face Pitch Designation: L; Face Type: FLAT GROOVED; Overall Length: 3.062 INCHES NOMINAL IN. 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.