The Pulley,groove, cataloged under National Stock Number 3020-01-044-3808, 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 Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-044-3808 |
| Primary Part Number | RE-C102120-1 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| 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 |
| Securing Method | DRILLED HOLE AND KEY |
| Split Hub Feature | NOT INCLUDED |
| Design Form | PLAIN |
| Unable to Decode | UNABLE TO DECODE |
| First Step Face Largest Diameter and Location | 0.625 INCHES NOMINAL AA END IN |
| Groove Radius | 0.344 INCHES NOMINAL IN |
| Groove Shape | U |
| Outside Diameter | 1.750 INCHES NOMINAL IN |
| Distance From Outside Flange/rim to Hub End and Location | 2.583 INCHES NOMINAL AA END IN |
| Second Step Length | 2.145 INCHES NOMINAL AA 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 | PLAIN OR STEPPED |
| Unable to Decode | UNABLE TO DECODE |
| First Step Length | 0.438 INCHES NOMINAL AA END IN |
| Securing Hole Quantity | 1 |
| Drilled Hole Diameter | 0.125 INCHES NOMINAL IN |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.406 INCHES NOMINAL BB END IN |
| Hole Location | CENTERED 2.364 IN. FROM END OF HUB IN |
| Material | COPPER ALLOY OVERALL |
| Face Width | 4.449 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 |
| Part Number | Manufacturer |
|---|---|
| RE-C102120-1 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| RE-C102120 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-044-3808 is a Pulley,groove, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-044-3808 has 1 manufacturer part number on file: RE-C102120-1 (Naval Sea Systems Command).
4 possible matches (shared part number, not a government interchangeability claim): 3020-01-044-9449, 3020-01-044-9450, 3020-01-045-0010. Verify interchangeability with system specifications before substitution.
Key specifications for RE-C102120-1: 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.