The Ring,piston, cataloged under National Stock Number 2825-00-271-9028, is classified within Federal Supply Class 2825 (Steam Turbines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Westinghouse Electric Corp. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 18 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 19 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 2825-00-271-9028 |
| Primary Part Number | D15-648XPC479 |
| Item Name | Ring,piston |
| FSC / FSG | 2825 / 28 — Steam Turbines and Components |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| FSC Application Data | PISTON,STEAM TURBINE |
| Cross-Sectional Shape Style | PLAIN RECTANGULAR, STRAIGHT FACE |
| Radial Wall Thickness | 0.0780 INCHES NOMINAL IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 1.750 INCHES IN |
| Material | IRON OVERALL |
| 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 |
|---|---|
| D15-648XPC479 | Westinghouse Electric Corp (USA) |
| D15-7940PC638 | Westinghouse Electric Corp (USA) |
| D15-673IPC438 | Westinghouse Electric Corp (USA) |
| D15-782QPC438 | Westinghouse Electric Corp (USA) |
| D15-739ZPC478 | Westinghouse Electric Corp (USA) |
| D15-772BPC438 | Westinghouse Electric Corp (USA) |
| D15-772IPC438 | Westinghouse Electric Corp (USA) |
| D15-794JPC638 | Westinghouse Electric Corp (USA) |
| D15-739MPC478 | Westinghouse Electric Corp (USA) |
| D15-794CPC638 | Westinghouse Electric Corp (USA) |
| D15-648BPC479 | Westinghouse Electric Corp (USA) |
| D15-782BPC438 | Westinghouse Electric Corp (USA) |
| D15-739YPC478 | Westinghouse Electric Corp (USA) |
| D15-794NPC638 | Westinghouse Electric Corp (USA) |
| 111104 | Westinghouse Electric Corp (USA) |
| D15-739XPC478 | Westinghouse Electric Corp (USA) |
| D15-648MPC479 | Westinghouse Electric Corp (USA) |
| D15-772NPC438 | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| D15-772BPC438 | 5/9 Secondary reference U.S. Government activity |
| D15-7940PC638 | 5/9 Secondary reference U.S. Government activity |
| D15-782BPC438 | 5/9 Secondary reference U.S. Government activity |
| D15-739XPC478 | 5/9 Secondary reference U.S. Government activity |
| D15-648XPC479 | 5/9 Secondary reference U.S. Government activity |
| D15-794NPC638 | 5/9 Secondary reference U.S. Government activity |
| D15-673IPC438 | 5/9 Secondary reference U.S. Government activity |
| D15-782QPC438 | 5/9 Secondary reference U.S. Government activity |
| D15-794CPC638 | 5/9 Secondary reference U.S. Government activity |
| D15-739MPC478 | 5/9 Secondary reference U.S. Government activity |
| 111104 | 3/9 Design control — primary reference U.S. Government activity |
| D15-739YPC478 | 5/9 Secondary reference U.S. Government activity |
| D15-739ZPC478 | 5/9 Secondary reference U.S. Government activity |
| D15-794JPC638 | 5/9 Secondary reference U.S. Government activity |
| D15-648BPC479 | 5/9 Secondary reference U.S. Government activity |
| D15-772IPC438 | 5/9 Secondary reference U.S. Government activity |
| D15-648MPC479 | 5/9 Secondary reference U.S. Government activity |
| D15-772NPC438 | 5/9 Secondary reference U.S. Government activity |
| 111104 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 2825-00-271-9028 is a Ring,piston, manufactured by Westinghouse Electric Corp, classified under FSC 2825, Steam Turbines and Components. Status: active.
NSN 2825-00-271-9028 has 18 manufacturer part numbers on file: D15-648XPC479 (Westinghouse Electric Corp), D15-7940PC638 (Westinghouse Electric Corp), D15-673IPC438 (Westinghouse Electric Corp), D15-782QPC438 (Westinghouse Electric Corp), D15-739ZPC478 (Westinghouse Electric Corp) and 13 more.
5 possible matches (shared part number, not a government interchangeability claim): 5940-00-892-7338, 7690-01-017-2246, 5340-01-298-0259. Verify interchangeability with system specifications before substitution.
Key specifications for D15-648XPC479: FSC Application Data: PISTON,STEAM TURBINE; Overall Width: 0.0780 INCHES NOMINAL IN; Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE; Radial Wall Thickness: 0.0780 INCHES NOMINAL IN. 6 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.