The Pulley,groove, cataloged under National Stock Number 3020-00-978-8909, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 26 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-978-8909 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Securing Method | THREADED HOLE(S) |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.500 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Shape | V |
| Outside Diameter | 2.375 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 2.250 INCHES NOMINAL IN |
| Groove Depth | 0.484 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 1 |
| V Groove Angle in Deg | 20.0 |
| Securing Hole Quantity | 1 |
| Thread Size | 1/4-20 |
| Surface Treatment | CADMIUM |
| Hole Location | LOCATED ON FACE OF PULLEY THROUGH TO BORE |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.500 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Face Width | 0.500 INCHES NOMINAL IN |
| Groove Width | 0.187 INCHES NOMINAL IN |
| Securing Location | PULLEY SURFACE |
| 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 |
|---|---|
| SH695 | 3/2 Design control — primary reference U.S. Government activity |
| ZSP6-051-3 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-00-978-8909 is a Pulley,groove, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-978-8909: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Securing Method: THREADED HOLE(S); Split Hub Feature: NOT INCLUDED. 26 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.