The Ring,piston, cataloged under National Stock Number 3040-01-189-6591, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Dana Off Highway Products, Llc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | Amz Alabama Inc. (CAGE 076M6); Dana Off Highway Products, Llc (CAGE 77237) |
| Parameter | Value |
|---|---|
| NSN | 3040-01-189-6591 |
| Primary Part Number | 250218 |
| Item Name | Ring,piston |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Dana Off Highway Products, Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 250218 | Amz Alabama Inc. (USA) |
| 250218 PRIMARY | Dana Off Highway Products, Llc (USA) |
| Reference | Meaning |
|---|---|
| 240293 | 5/9 Secondary reference U.S. Government activity |
| 240293 | 5/9 Secondary reference Vme Americas Inc Sub of Vme Group N V |
| 250218 | 5/9 Secondary reference Vme Americas Inc Sub of Vme Group N V |
NSN 3040-01-189-6591 is a Ring,piston, manufactured by Dana Off Highway Products, Llc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-189-6591 has 2 manufacturer part numbers on file: 250218 (Amz Alabama Inc.), 250218 (Dana Off Highway Products, Llc).
2 possible matches (shared part number, not a government interchangeability claim): 7025-01-593-3442, 5330-01-594-7209. 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.