The Pulley,groove, cataloged under National Stock Number 3020-00-640-2772, 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 U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-640-2772 |
| Primary Part Number | 6282979 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| FSC Application Data | ENGINE GENERATOR DRIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 1.281 INCHES NOMINAL AA END IN |
| Hub Outside Diameter | 1.336 INCHES NOMINAL AND 1.340 INCHES NOMINAL BB END IN |
| Bore Feature | NOT INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | NOT OFFSET |
| Groove Shape | V |
| Outside Diameter | 7.082 INCHES MINIMUM AND 7.098 INCHES MAXIMUM IN |
| Spline Length | 2.000 INCHES NOMINAL IN |
| Style Designator | WEBBED OR SPOKED |
| Pitch Diameter | 6.590 INCHES NOMINAL IN |
| Spline Major Diameter | 0.874 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN |
| Groove Depth | 0.688 INCHES NOMINAL IN |
| Bore Type | INVOLUTE SPLINE OR SPLINED |
| Groove Quantity | 1 |
| V Groove Angle in Deg | 36.0 |
| Spline Quantity | 6 |
| Unable to Decode | UNABLE TO DECODE AND UNABLE TO DECODE AND UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.535 INCHES NOMINAL AA END AND 0.541 INCHES NOMINAL AA END AND 0.459 INCHES NOMINAL BB END AND 0.465 INCHES NOMINAL BB END IN |
| Minor Diameter | 0.699 INCHES MINIMUM AND 0.700 INCHES MAXIMUM SPLINE IN |
| Counterbore Feature | NOT INCLUDED |
| Material | IRON OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 1.000 INCHES NOMINAL IN |
| Groove Width | 0.654 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN |
| Lightening Hole | INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 6282979 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 0E1632 | 3/9 Design control — primary reference U.S. Government activity |
NSN 3020-00-640-2772 is a Pulley,groove, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-640-2772 has 1 manufacturer part number on file: 6282979 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 6282979: FSC Application Data: ENGINE GENERATOR DRIVE; Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 1.281 INCHES NOMINAL AA END IN; Hub Outside Diameter: 1.336 INCHES NOMINAL AND 1.340 INCHES NOMINAL BB END IN. 28 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.
NSN 3020-00-640-2772 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.