The Ring,piston, cataloged under National Stock Number 2815-01-304-2604, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Siemens Energy and Automation Inc Large Motor and Generator Div. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Ring,piston |
| FSC / FSG | 2815 — Diesel Engines and Components (FSG 28) |
| Manufacturers | Siemens Energy and Automation Inc Large Motor and Generator Div (CAGE 6P141); Siemens Energy Global Gmbh & Co. Kg Se Gp I So Cs Ma (CAGE D1149) |
| Parameter | Value |
|---|---|
| NSN | 2815-01-304-2604 |
| Primary Part Number | U-235-DIN933-CUZN |
| Item Name | Ring,piston |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Siemens Energy and Automation Inc Large Motor and Generator Div |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| U-235-DIN933-CUZN PRIMARY | Siemens Energy and Automation Inc Large Motor and Generator Div (USA) |
| U-235-DIN933-CUZN | Siemens Energy Global Gmbh & Co. Kg Se Gp I So Cs Ma (DEU) |
| Reference | Meaning |
|---|---|
| U-235 | 5/9 Secondary reference Siemens Energy Global Gmbh & Co. Kg Se Gp I So Cs Ma |
NSN 2815-01-304-2604 is a Ring,piston, manufactured by Siemens Energy and Automation Inc Large Motor and Generator Div, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-01-304-2604 has 2 manufacturer part numbers on file: U-235-DIN933-CUZN (Siemens Energy and Automation Inc Large Motor and Generator Div), U-235-DIN933-CUZN (Siemens Energy Global Gmbh & Co. Kg Se Gp I So Cs Ma).
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.