The Pulley,groove, cataloged under National Stock Number 3020-00-779-7231, 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29 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-779-7231 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 3.750 INCHES NOMINAL AA END IN |
| Bore Feature | INCLUDED |
| Securing Method | THREADED HOLE(S) |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 2.438 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Shape | V |
| Standard V-Belt Section Designation for Which Designed | A |
| Outside Diameter | 6.437 INCHES NOMINAL IN |
| Spline Length | 2.438 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 5.153 INCHES NOMINAL IN |
| Spline Major Diameter | 0.850 INCHES NOMINAL IN |
| Groove Depth | 0.641 INCHES NOMINAL IN |
| Bore Type | STRAIGHT SPLINE |
| Bearings | NOT INCLUDED |
| Counterbore Depth | 0.688 INCHES NOMINAL IN |
| Groove Quantity | 3 |
| Counterbore Location | AA END |
| V Groove Angle in Deg | 36.0 |
| Spline Quantity | 6 |
| Counterbore Diameter | 1.250 INCHES NOMINAL IN |
| Securing Hole Quantity | 6 |
| Thread Size | 5/16 - 18 |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 1.625 INCHES NOMINAL AA END IN |
| Hole Location | EQUALLY SPACED ON 2-1/2 IN. DIA BOLT CIRCLE IN |
| Counterbore Feature | 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 |
|---|---|
| S820K405 | 3/9 Design control — primary reference Teledyne Continental Motors Industrial Products Div Teledyne Industries Inc Sub of Teledyne Inc |
NSN 3020-00-779-7231 is a Pulley,groove, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-779-7231: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 3.750 INCHES NOMINAL AA END IN; Bore Feature: INCLUDED; Securing Method: THREADED HOLE(S). 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.