The Ring,piston, cataloged under National Stock Number 2815-00-994-4429, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Cummins Inc.. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 2815-00-994-4429 |
| Primary Part Number | 4058969 |
| Item Name | Ring,piston |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Cummins Inc. |
| Status | CANCELLED |
| Cross-Sectional Shape Style | BEVELED FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL |
| Joint Style | VERTICAL JOINT |
| Oil Passage Type and Quantity | 1 GROOVE OUTSIDE PERIPHERY |
| Oil Passage Type and Quantity | 12 SLOT HORIZONTALLY THROUGH RING |
| Radial Wall Thickness | 0.2400 INCHES NOMINAL IN |
| Ring Style | CONCENTRIC |
| Surface Treatment | CHROMIUM OVERALL |
| Standard Bore Diameter | 5.500 INCHES IN |
| Material | STEEL OVERALL |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4058969 PRIMARY | Cummins Inc. (USA) |
| Reference | Meaning |
|---|---|
| 194610 | 5/9 Secondary reference Cummins Inc. |
| 165370 | D/9 Drawing number reference only Cummins Inc. |
| 2815009944429 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 218732 | 5/9 Secondary reference Cummins Inc. |
| 10395927 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| AR05100 | C/1 Advisory reference — outside the item-of-supply concept Cummins Inc. |
| 3064398 | 5/9 Secondary reference Cummins Inc. |
| 122560 | 5/9 Secondary reference Cummins Inc. |
NSN 2815-00-994-4429 is a Ring,piston, manufactured by Cummins Inc., classified under FSC 2815, Diesel Engines and Components. Status: cancelled.
NSN 2815-00-994-4429 has 1 manufacturer part number on file: 4058969 (Cummins Inc.).
4 possible matches (shared part number, not a government interchangeability claim): 5305-01-020-8808, 4730-01-348-1455, 4820-01-424-1787. Verify interchangeability with system specifications before substitution.
Key specifications for 4058969: Overall Width: 0.1860 INCHES MINIMUM AND 0.1870 INCHES MAXIMUM IN; Cross-Sectional Shape Style: BEVELED FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL; Joint Style: VERTICAL JOINT; Oil Passage Type and Quantity: 1 GROOVE OUTSIDE PERIPHERY. 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.
NSN 2815-00-994-4429 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.