The Ring,piston, cataloged under National Stock Number 2805-00-845-6829, 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 Ge Aviation Systems Llc Dba Ge Aviation Systems Llc. Government technical data includes 8 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-845-6829 |
| Primary Part Number | BYLB34 |
| Item Name | Ring,piston |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc |
| Status | ACTIVE |
| FSC Application Data | AIR SHUTOFF VALVE,REFRIGERATION SYSTEM,ACFT |
| Material Document and Classification | AMS5621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | PLAIN RECTANGULAR, STRAIGHT FACE |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.1550 INCHES MINIMUM AND 0.1600 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 2.875 INCHES IN |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| BYLB34 PRIMARY | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc (USA) |
NSN 2805-00-845-6829 is a Ring,piston, manufactured by Ge Aviation Systems Llc Dba Ge Aviation Systems Llc, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-845-6829 has 1 manufacturer part number on file: BYLB34 (Ge Aviation Systems Llc Dba Ge Aviation Systems Llc).
Key specifications for BYLB34: FSC Application Data: AIR SHUTOFF VALVE,REFRIGERATION SYSTEM,ACFT; Overall Width: 0.0300 INCHES MINIMUM AND 0.0310 INCHES MAXIMUM IN; Material Document and Classification: AMS5621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE. 8 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 2805-00-845-6829 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.