The Ring,piston, cataloged under National Stock Number 2810-00-293-3940, 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 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2810-00-293-3940 |
| Primary Part Number | 188537P10W |
| Item Name | Ring,piston |
| FSC / FSG | 2810 / 28 — Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| FSC Application Data | ACFT ENG R2800 |
| Bore Diameter Oversize | 0.010 INCHES IN |
| Cross-Sectional Shape Style | DOUBLE INSIDE BEVEL, BEVELED UPPER FACE |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.2000 INCHES NOMINAL IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 5.750 INCHES IN |
| Material | IRON OVERALL |
| 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 |
|---|---|
| 188537P10W | Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN) |
| 188537P10W PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 2810-00-293-3940 is a Ring,piston, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 2810, Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components. Status: active.
NSN 2810-00-293-3940 has 2 manufacturer part numbers on file: 188537P10W (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.), 188537P10W (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 188537P10W: FSC Application Data: ACFT ENG R2800; Bore Diameter Oversize: 0.010 INCHES IN; Overall Width: 0.1180 INCHES NOMINAL IN; Cross-Sectional Shape Style: DOUBLE INSIDE BEVEL, BEVELED UPPER 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.
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.