The Ring,piston, cataloged under National Stock Number 4310-00-131-2902, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-00-131-2902 |
| Item Name | Ring,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Status | ACTIVE |
| FSC Application Data | PISTON,AIR COMPRESSOR |
| Cross-Sectional Shape Style | STRAIGHT FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL |
| Joint Style | VERTICAL JOINT |
| Oil Passage Type and Quantity | 1 GROOVE OUTSIDE PERIPHERY |
| Oil Passage Type and Quantity | 10 SLOT HORIZONTALLY THROUGH RING |
| Radial Wall Thickness | 0.2545 INCHES MINIMUM AND 0.2695 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 7.250 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 |
| Reference | Meaning |
|---|---|
| 3088B | 5/9 Secondary reference U.S. Government activity |
| 157437PC148 | 5/9 Secondary reference U.S. Government activity |
| 157016PC148 | 5/9 Secondary reference U.S. Government activity |
| 3088B | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| 157013PC148 | 5/9 Secondary reference U.S. Government activity |
| 157440PC148 | 5/9 Secondary reference U.S. Government activity |
| 3088B | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 220062AD1 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| 200110RPC228 | 5/9 Secondary reference U.S. Government activity |
| 156414PC148 | 5/9 Secondary reference U.S. Government activity |
| 220062AD1 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
NSN 4310-00-131-2902 is a Ring,piston, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
Key specifications for 4310-00-131-2902: FSC Application Data: PISTON,AIR COMPRESSOR; Overall Width: 0.3110 INCHES NOMINAL IN; Cross-Sectional Shape Style: STRAIGHT FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL; Joint Style: VERTICAL JOINT. 9 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.