The Pulley,groove, cataloged under National Stock Number 3020-01-079-4206, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Cummins Inc.. Government technical data includes 26 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-079-4206 |
| Primary Part Number | 21539700 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Cummins Inc. |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 2.625 INCHES NOMINAL BB END IN |
| Hub Outside Diameter | 2.969 INCHES NOMINAL AA END IN |
| Bore Feature | NOT INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 1.500 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Shape | V |
| Outside Diameter | 4.000 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 4.0000 INCHES NOMINAL IN |
| Groove Depth | 0.140 INCHES NOMINAL IN |
| Groove Quantity | 6 |
| Counterbore Location | AA END |
| V Groove Angle in Deg | 40.0 |
| Protruding Hub Characteristic | PLAIN |
| Counterbore Diameter | 2.530 INCHES NOMINAL IN |
| Unable to Decode | UNABLE TO DECODE AND UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.328 INCHES NOMINAL AA END AND 0.031 INCHES NOMINAL BB END IN |
| Counterbore Feature | INCLUDED |
| Bore Diameter | 2.125 INCHES NOMINAL IN |
| Material | IRON CAST OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 1.140 INCHES NOMINAL IN |
| Groove Width | 0.140 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 |
| Part Number | Manufacturer |
|---|---|
| 21539700 PRIMARY | Cummins Inc. (USA) |
| MA207 21 204 | Am General Llc (USA) |
| Reference | Meaning |
|---|---|
| 215397 | 5/9 Secondary reference Cummins Inc. |
NSN 3020-01-079-4206 is a Pulley,groove, manufactured by Cummins Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-079-4206 has 2 manufacturer part numbers on file: 21539700 (Cummins Inc.), MA207 21 204 (Am General Llc).
Key specifications for 21539700: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 2.625 INCHES NOMINAL BB END IN; Hub Outside Diameter: 2.969 INCHES NOMINAL AA END IN; Bore 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.