The Ring,piston, cataloged under National Stock Number 2805-00-020-5044, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 2805-00-020-5044 |
| Item Name | Ring,piston |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Status | ACTIVE |
| Radial Wall Thickness | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 0.939 INCHES IN |
| Material | CARBON 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 |
|---|---|
| 206-082 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2805-00-020-5044 is a Ring,piston, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5325-00-281-9856, 4730-00-986-0176. Verify interchangeability with system specifications before substitution.
Key specifications for 2805-00-020-5044: Overall Width: 0.1410 INCHES NOMINAL IN; Radial Wall Thickness: 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN; Ring Style: CONCENTRIC; Standard Bore Diameter: 0.939 INCHES IN. 4 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.