The Pulley,cone, cataloged under National Stock Number 3020-00-657-9494, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-657-9494 |
| Item Name | Pulley,cone |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bearing Quantity | 1 |
| Bore Length | 1.024 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | OFFSET |
| Groove Radius | 0.075 INCHES NOMINAL IN |
| Face Type | STEP GROOVE |
| Groove Shape | U |
| Style Designator | WEBBED OR SPOKED |
| Groove Depth | 0.159 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Groove Quantity | 3 |
| Bore Bearing | INCLUDED |
| Bearing Type | BALL |
| Step Outside Diameter | 3.406 INCHES MINIMUM AND 4.406 INCHES MAXIMUM IN |
| Keying Facility | NOT INCLUDED |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.625 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Face Width | 0.360 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN |
| Groove Width | 0.159 INCHES NOMINAL IN |
| Lightening Hole | NOT INCLUDED |
| 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 |
|---|---|
| 363858-2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-657-9494 is a Pulley,cone, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-735-4980. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-657-9494: Integral Cooling Vane: NOT INCLUDED; Bearing Quantity: 1; Bore Length: 1.024 INCHES NOMINAL IN; Design Form: WEBBED. 22 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.