The Pulley,groove, cataloged under National Stock Number 3020-00-121-0405, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 25 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-00-121-0405 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 0.250 INCHES NOMINAL AA END IN |
| Hub Outside Diameter | 0.250 INCHES NOMINAL BB END IN |
| Bore Feature | INCLUDED |
| Bearing Quantity | 1 |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.250 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Outside Diameter | 0.969 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 0.906 INCHES NOMINAL IN |
| Groove Depth | 0.078 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | INCLUDED |
| Groove Quantity | 1 |
| V Groove Angle in Deg | 60.000 |
| Bearing Type | SLEEVE |
| Unable to Decode | UNABLE TO DECODE AND UNABLE TO DECODE |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.187 INCHES NOMINAL IN |
| Material | ALUMINUM OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 0.218 INCHES NOMINAL IN |
| Groove Width | 0.203 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 |
|---|---|
| 7770D | 3/9 Design control — primary reference U.S. Government activity |
| A7770D | 5/9 Secondary reference U.S. Government activity |
NSN 3020-00-121-0405 is a Pulley,groove, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-121-0405: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 0.250 INCHES NOMINAL AA END IN; Hub Outside Diameter: 0.250 INCHES NOMINAL BB END IN; Bore Feature: INCLUDED. 25 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.