The Pulley,groove, cataloged under National Stock Number 3020-01-221-7491, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 29 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-221-7491 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 0.590 INCHES NOMINAL AA END IN |
| Bore Feature | INCLUDED |
| Bore Length | 0.531 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Unable to Decode | UNABLE TO DECODE |
| First Step Face Largest Diameter and Location | 0.875 INCHES NOMINAL AA END IN |
| Groove Radius | 0.200 INCHES NOMINAL IN |
| Groove Shape | U |
| Outside Diameter | 1.312 INCHES NOMINAL IN |
| Second Step Length | 1.417 INCHES NOMINAL AA END IN |
| Style Designator | PLAIN |
| Groove Depth | 0.356 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 7 |
| Protruding Hub Characteristic | STEPPED |
| Unable to Decode | UNABLE TO DECODE |
| First Step Length | 0.520 INCHES NOMINAL AA END IN |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 1.538 INCHES NOMINAL AA END IN |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.315 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 3.650 INCHES NOMINAL IN |
| Groove Width | 0.502 INCHES NOMINAL IN |
| Lightening Hole | NOT INCLUDED |
| Unable to Decode | UNABLE TO DECODE |
| 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 |
|---|---|
| 8-52-53M | D/9 Drawing number reference only Illinois Tool Wks Inc Linac Div |
| 8-52-53M-2 | 5/9 Secondary reference Illinois Tool Wks Inc Linac Div |
| 8-52-53M-2 | 3/9 Design control — primary reference Itw Heartland Components Inc |
NSN 3020-01-221-7491 is a Pulley,groove, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-221-7491: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 0.590 INCHES NOMINAL AA END IN; Bore Feature: INCLUDED; Bore Length: 0.531 INCHES NOMINAL IN. 29 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.