The Ring,piston, cataloged under National Stock Number 2805-01-614-7517, 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 Bird-Johnson Propeller Company, Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-01-614-7517 |
| Primary Part Number | YM11731 |
| Item Name | Ring,piston |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Bird-Johnson Propeller Company, Llc |
| Status | ACTIVE |
| Joint Style | VERTICAL JOINT |
| 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 |
|---|---|
| YM11731 | Rolls-Royce Plc Naval Marine (GBR) |
| A1-43-22 FIQURE 01 ITEM 328 | Bird-Johnson Propeller Company, Llc (USA) |
| 40071319 | Ministry of Defence, Future Aircraft Carrier Ipt (cvf Ipt) (GBR) |
| YM11731 PRIMARY | Bird-Johnson Propeller Company, Llc (USA) |
NSN 2805-01-614-7517 is a Ring,piston, manufactured by Bird-Johnson Propeller Company, Llc, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-01-614-7517 has 4 manufacturer part numbers on file: YM11731 (Rolls-Royce Plc Naval Marine), A1-43-22 FIQURE 01 ITEM 328 (Bird-Johnson Propeller Company, Llc), 40071319 (Ministry of Defence, Future Aircraft Carrier Ipt (cvf Ipt)), YM11731 (Bird-Johnson Propeller Company, Llc).
Key specifications for YM11731: Joint Style: VERTICAL JOINT; Special Features: FUEL SPRAY NOZZLE; Part Name Assigned by Controlling Agency: RING, PISTON. 1 specification is 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.