The Guard,mechanical Drive, cataloged under National Stock Number 3020-01-503-2139, 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. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Guard,mechanical Drive |
| FSC / FSG | 3020 — Gears, Pulleys, Sprockets, and Transmission Chain (FSG 30) |
| Manufacturers | Naval Sea Systems Command (CAGE 53711) |
| Parameter | Value |
|---|---|
| NSN | 3020-01-503-2139 |
| Primary Part Number | 596-7409742-65 |
| Item Name | Guard,mechanical Drive |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| 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 |
|---|---|
| 596-7409742-65 PRIMARY | Naval Sea Systems Command (USA) |
| 596-7409748-95 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 7409748 | D/9 Drawing number reference only Naval Sea Systems Command |
| B831-6500-95 | 5/2 Secondary reference U.S. Government activity |
| 7409742 | D/9 Drawing number reference only Naval Sea Systems Command |
| B831-6000-65 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-01-503-2139 is a Guard,mechanical Drive, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-503-2139 has 2 manufacturer part numbers on file: 596-7409742-65 (Naval Sea Systems Command), 596-7409748-95 (Naval Sea Systems Command).
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.