The Ring,piston, cataloged under National Stock Number 2810-01-293-7985, is classified within Federal Supply Class 2810 (Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road). Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2810-01-293-7985 |
| Primary Part Number | 859989-50 |
| Item Name | Ring,piston |
| FSC / FSG | 2810 / 28 — Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components |
| Manufacturer | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| Status | ACTIVE |
| Cross-Sectional Shape Style | PLAIN RECTANGULAR, STRAIGHT FACE |
| Distance From Pin Hole Center to Edge | 0.096 INCHES NOMINAL IN |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.1510 INCHES MINIMUM AND 0.1610 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Pinhole Diameter | 0.081 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN |
| Standard Bore Diameter | 3.244 INCHES IN |
| Pin Hole Style | ROUND PINHOLE AT 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 |
|---|---|
| 859989-50 PRIMARY | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
| 859989-50 | Aero International, Llc Dba Ams Engineered Solutions (USA) |
| Reference | Meaning |
|---|---|
| 859989-50 | 5/9 Secondary reference U.S. Government activity |
NSN 2810-01-293-7985 is a Ring,piston, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road), classified under FSC 2810, Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components. Status: active.
NSN 2810-01-293-7985 has 2 manufacturer part numbers on file: 859989-50 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)), 859989-50 (Aero International, Llc Dba Ams Engineered Solutions).
Key specifications for 859989-50: Overall Width: 0.0440 INCHES MINIMUM AND 0.0450 INCHES MAXIMUM IN; Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE; Distance From Pin Hole Center to Edge: 0.096 INCHES NOMINAL IN; Joint Style: VERTICAL JOINT. 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.
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.