The Pulley,groove, cataloged under National Stock Number 3020-01-044-5857, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 28 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-044-5857 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 0.621 INCHES NOMINAL AA END IN |
| Hub Outside Diameter | 0.621 INCHES NOMINAL BB END IN |
| Bore Feature | NOT INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Design Form | PLAIN |
| Unable to Decode | UNABLE TO DECODE AND UNABLE TO DECODE |
| First Step Face Largest Diameter and Location | 1.750 INCHES NOMINAL AA END AND 1.750 INCHES NOMINAL BB END IN |
| Groove Radius | 0.344 INCHES NOMINAL IN |
| Groove Shape | U |
| Outside Diameter | 1.750 INCHES NOMINAL IN |
| Second Step Length | 0.311 INCHES NOMINAL AA END IN |
| Second Step Length | 0.534 INCHES NOMINAL BB END IN |
| Style Designator | PLAIN |
| Material Document and Classification | QQ-C-530,COND A OR H FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Groove Depth | 0.625 INCHES NOMINAL IN |
| Groove Quantity | 5 |
| Protruding Hub Characteristic | STEPPED |
| Unable to Decode | UNABLE TO DECODE AND UNABLE TO DECODE |
| First Step Length | 0.406 INCHES NOMINAL BB END IN |
| First Step Length | 1.584 INCHES NOMINAL AA END IN |
| Unable to Decode | UNABLE TO DECODE AND UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 1.895 INCHES NOMINAL AA END AND 0.938 INCHES NOMINAL BB END IN |
| Material | COPPER ALLOY OVERALL |
| Face Width | 4.170 INCHES NOMINAL IN |
| Groove Width | 0.844 INCHES NOMINAL IN |
| Lightening Hole | NOT INCLUDED |
| Unable to Decode | UNABLE TO DECODE AND UNABLE TO DECODE |
| 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 |
|---|---|
| ASC1538949 | 5/9 Secondary reference Asc Pty Ltd |
| RED102128 | 5/9 Secondary reference Naval Sea Systems Command |
| RED102128 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-044-5857 is a Pulley,groove, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-044-5857: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 0.621 INCHES NOMINAL AA END IN; Hub Outside Diameter: 0.621 INCHES NOMINAL BB END IN; Bore Feature: NOT INCLUDED. 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.
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.