The Ring,piston, cataloged under National Stock Number 2810-00-810-4775, 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 Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2810-00-810-4775 |
| Primary Part Number | 188549 |
| Item Name | Ring,piston |
| FSC / FSG | 2810 / 28 — Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components |
| Manufacturer | Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. |
| Status | ACTIVE |
| FSC Application Data | ENGINE,AIRCRAFT,RECIPROCATING |
| Cross-Sectional Shape Style | PLAIN KEYSTONE, STRAIGHT RADII FACE |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.1750 INCHES MINIMUM AND 0.1850 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 5.500 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 |
|---|---|
| 188549 PRIMARY | Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN) |
| Reference | Meaning |
|---|---|
| 188549 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
NSN 2810-00-810-4775 is a Ring,piston, manufactured by Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp., classified under FSC 2810, Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components. Status: active.
NSN 2810-00-810-4775 has 1 manufacturer part number on file: 188549 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-536-6450. Verify interchangeability with system specifications before substitution.
Key specifications for 188549: FSC Application Data: ENGINE,AIRCRAFT,RECIPROCATING; Overall Width: 0.0990 INCHES MINIMUM AND 0.1000 INCHES MAXIMUM IN; Cross-Sectional Shape Style: PLAIN KEYSTONE, STRAIGHT RADII FACE; Joint Style: VERTICAL JOINT. 7 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.