The Pulley,groove, cataloged under National Stock Number 3020-01-485-4319, 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 20 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-485-4319 |
| Primary Part Number | 580-6641123-0487 |
| 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 |
| Bore Feature | INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 1.0700 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Radius | 0.2650 INCHES NOMINAL IN |
| Groove Shape | U |
| Outside Diameter | 10.210 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 9.6050 INCHES NOMINAL IN |
| Groove Depth | 0.6050 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 1 |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 1.7495 INCHES MINIMUM AND 1.7520 INCHES MAXIMUM IN |
| Material | COPPER ALLOY OVERALL |
| Face Width | 1.0630 INCHES MINIMUM AND 1.0700 INCHES MAXIMUM IN |
| Groove Width | 1.0000 INCHES NOMINAL IN |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 580-6641123-ECHG-A88 | Naval Sea Systems Command (USA) |
| 6921603-A88 | Naval Sea Systems Command (USA) |
| 580-6641123-0487 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6641123 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-485-4319 is a Pulley,groove, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-485-4319 has 3 manufacturer part numbers on file: 580-6641123-ECHG-A88 (Naval Sea Systems Command), 6921603-A88 (Naval Sea Systems Command), 580-6641123-0487 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 4030-01-486-7727, 5310-01-492-4607. Verify interchangeability with system specifications before substitution.
Key specifications for 580-6641123-0487: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Split Hub Feature: NOT INCLUDED; Bore Length: 1.0700 INCHES NOMINAL IN. 20 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.