The Ring Set,piston, cataloged under National Stock Number 2805-00-862-0645, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Dresser, Llc. Government technical data includes 3 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. 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 | 2805-00-862-0645 |
| Primary Part Number | 905-392 |
| Item Name | Ring Set,piston |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Dresser, Llc |
| Status | ACTIVE |
| Ring Set Component Parts | 64104 195005 COMPRESSION RING 6; 64104 195205 OIL RING 6; 64104 SCRAPER RING 6 |
| Piston Accommodation Quantity | 6 |
| Standard Bore Diameter | 4.125 INCHES IN |
| 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 |
|---|---|
| 905-392 PRIMARY | Dresser, Llc (USA) |
NSN 2805-00-862-0645 is a Ring Set,piston, manufactured by Dresser, Llc, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-862-0645 has 1 manufacturer part number on file: 905-392 (Dresser, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5940-01-221-2997. Verify interchangeability with system specifications before substitution.
Key specifications for 905-392: Ring Set Component Parts: 64104 195005 COMPRESSION RING 6; 64104 195205 OIL RING 6; 64104 SCRAPER RING 6; Piston Accommodation Quantity: 6; Standard Bore Diameter: 4.125 INCHES IN. 3 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.