The Pulley,groove, cataloged under National Stock Number 3020-00-424-8638, 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29 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-424-8638 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| FSC Application Data | FUEL PUMP GROUP,DIESEL ENGINE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 0.875 INCHES NOMINAL BOTH ENDS IN |
| Bore Feature | INCLUDED |
| Securing Method | THREADED HOLE(S) |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.875 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | OFFSET |
| Groove Shape | V |
| Standard V-Belt Section Designation for Which Designed | A |
| Outside Diameter | 5.000 INCHES NOMINAL IN |
| Style Designator | WEBBED OR SPOKED |
| Pitch Diameter | 4.875 INCHES NOMINAL IN |
| Groove Depth | 0.437 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 1 |
| V Groove Angle in Deg | 38.0 |
| Securing Hole Quantity | 1 |
| Thread Size | 5/16 - 18 |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.906 INCHES MINIMUM AA END AND 0.781 INCHES MAXIMUM BB END IN |
| Hole Location | IN RIM OF HUB |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.4365 INCHES MINIMUM AND 0.4380 INCHES MAXIMUM IN |
| Material | IRON OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 0.750 INCHES NOMINAL IN |
| 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 |
|---|---|
| 3H1918P20 | 5/2 Secondary reference U.S. Government activity |
| 8273DX | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-424-8638 is a Pulley,groove, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-424-8638: FSC Application Data: FUEL PUMP GROUP,DIESEL ENGINE; Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 0.875 INCHES NOMINAL BOTH ENDS IN; Bore Feature: INCLUDED. 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.