The Pulley,groove, cataloged under National Stock Number 3020-01-012-5731, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 30 specifications, cited from the U.S. Government catalog. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-012-5731 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Bearing Quantity | 1 |
| Securing Method | DRILLED HOLE |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.688 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | NOT OFFSET |
| Groove Shape | V |
| Outside Diameter | 7.375 INCHES NOMINAL IN |
| Shaft Size for Which Designed | 0.512 INCHES NOMINAL IN |
| Style Designator | WEBBED OR SPOKED |
| Pitch Diameter | 6.250 INCHES NOMINAL IN |
| Groove Depth | 1.125 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | INCLUDED |
| Groove Quantity | 1 |
| V Groove Angle in Deg | 20.0 |
| Bolt Circle Diameter | 2.250 INCHES NOMINAL IN |
| Drilled Hole Diameter | 0.313 INCHES NOMINAL IN |
| Bearing Type | BALL |
| Distance From Outside Flange/rim to Hub End and Location | 0.531 INCHES NOMINAL BOTH ENDS IN |
| Hole Location | THRU PULLEY BODY |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.512 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Face Width | 1.250 INCHES NOMINAL IN |
| Groove Width | 0.875 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 |
|---|---|
| 01010853 | 5/9 Secondary reference U.S. Government activity |
| PV3-612AC | 5/9 Secondary reference General Motors Corp Delco Moraine Ndh Div |
| D200661L001PC1 | 5/9 Secondary reference U.S. Government activity |
| 01010853 | C/1 Advisory reference — outside the item-of-supply concept Timken Co Div the Timken Company |
| 114383 | 3/2 Design control — primary reference U.S. Government activity |
| Z200661L002 | 5/2 Secondary reference U.S. Government activity |
| 01010853 | C/1 Advisory reference — outside the item-of-supply concept Lta/d-Cemco Inc Dba D-Cemco |
| D200661L001 ITEM #1 | 5/9 Secondary reference U.S. Government activity |
NSN 3020-01-012-5731 is a Pulley,groove, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 6680-01-280-8904, 6750-01-427-0651. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-012-5731: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Bearing Quantity: 1; Securing Method: DRILLED HOLE. 30 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.