The Pulley,timing Belt, cataloged under National Stock Number 3020-01-377-4201, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-377-4201 |
| Item Name | Pulley,timing Belt |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Type | SETSCREW |
| Hub Diameter | 0.812 INCHES NOMINAL IN |
| Face Pitch Designation | XL |
| Face Type | FLAT GROOVED WITH DOUBLE FLANGE |
| Bore Type | SPECIFIED |
| Face Groove/tooth Quantity | 18 |
| Surface Treatment | ANODIZE |
| Bore Diameter | 0.375 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY |
| Face Width | 0.562 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 |
|---|---|
| 790-095 | D/9 Drawing number reference only Bow Industries of Virginia Inc Dba Bow Industries |
| 6A3-18DF03712-3/8 | 5/1 Secondary reference Designatronics Inc Div Stock Drive Products |
| 18XLB037X3/8 | 5/1 Secondary reference Emerson Electric Co Browning Mfg Div |
| 790-095-01 | 3/9 Design control — primary reference Bow Industries of Virginia Inc Dba Bow Industries |
NSN 3020-01-377-4201 is a Pulley,timing Belt, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-462-7346. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-377-4201: Hub Type: SETSCREW; Hub Diameter: 0.812 INCHES NOMINAL IN; Face Pitch Designation: XL; Face Type: FLAT GROOVED WITH DOUBLE FLANGE. 10 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.