The Ring,piston, cataloged under National Stock Number 3040-01-728-8985, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Ring,piston |
| FSC / FSG | 3040 — Miscellaneous Power Transmission Equipment (FSG 30) |
| Manufacturers | Naval Sea Systems Command (CAGE 53711) |
| Parameter | Value |
|---|---|
| NSN | 3040-01-728-8985 |
| Primary Part Number | 752-8838722-1 |
| Item Name | Ring,piston |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| 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 |
|---|---|
| 752-8838722-1 PRIMARY | Naval Sea Systems Command (USA) |
| 218115484 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 8838722 | D/9 Drawing number reference only Naval Sea Systems Command |
| R8320340-1 | 5/2 Secondary reference U.S. Government activity |
| LSA001388-1 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-01-728-8985 is a Ring,piston, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-728-8985 has 2 manufacturer part numbers on file: 752-8838722-1 (Naval Sea Systems Command), 218115484 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-728-9297. Verify interchangeability with system specifications before substitution.
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.