The Ring,piston, cataloged under National Stock Number 2825-00-972-8889, is classified within Federal Supply Class 2825 (Steam Turbines and Components) of the Engines, Turbines, and Components group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 2825-00-972-8889 |
| Item Name | Ring,piston |
| FSC / FSG | 2825 / 28 — Steam Turbines and Components |
| Status | ACTIVE |
| Material Document and Classification | QQ-S-631 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | STRAIGHT FACE, DOUBLE SCRAPER |
| Joint Style | VERTICAL JOINT |
| Oil Passage Type and Quantity | 2 GROOVE OUTSIDE PERIPHERY |
| Radial Wall Thickness | 4.7180 INCHES NOMINAL IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 1.250 INCHES IN |
| Material | STEEL COMP 1020 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 432B570-1 | 3/9 Design control — primary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 432B570-1 | 5/9 Secondary reference General Electric Company |
| 432B570PC1 | 5/9 Secondary reference General Electric Company |
NSN 2825-00-972-8889 is a Ring,piston, classified under FSC 2825, Steam Turbines and Components. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 2825-01-068-6198. Verify interchangeability with system specifications before substitution.
Key specifications for 2825-00-972-8889: Overall Width: 0.9380 INCHES NOMINAL IN; Material Document and Classification: QQ-S-631 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: STRAIGHT FACE, DOUBLE SCRAPER; Joint Style: VERTICAL JOINT. 8 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.