The Piston,internal Combustion Engin, cataloged under National Stock Number 2810-00-031-6323, 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 28 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2810-00-031-6323 |
| Primary Part Number | 166313 |
| Item Name | Piston,internal Combustion Engin |
| 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 | ACFT ENG R2000 |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.12925 INCHES NOMINAL THIRD RING IN |
| Ring Groove Width | 0.13000 INCHES NOMINAL FIRST RING IN |
| Ring Groove Width | 0.22175 INCHES NOMINAL SECOND RING IN |
| Distance Between Pin Bosses | 2.000 INCHES NOMINAL IN |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Ring Groove Position and Quantity | NUMBER 1,NUMBER 2,NUMBER 3 AND NO. 4 AND NO. 5 PISTON ALL RINGS |
| Diameter | 5.726 INCHES NOMINAL IN |
| Ring Groove Diameter | 5.177 INCHES NOMINAL FIRST RING IN |
| Ring Groove Diameter | 5.207 INCHES NOMINAL SECOND RING IN |
| Ring Groove Diameter | 5.327 INCHES NOMINAL THIRD RING IN |
| Distance From Pin Hole Center to Extreme Top | 2.610 INCHES NOMINAL IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | LOCKING |
| Oil Groove | NOT INCLUDED |
| Head Style | CONCAVE |
| Ring Groove Quantity | 5 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Surface Treatment | TIN |
| Pinhole Diameter | 1.3730 INCHES NOMINAL IN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | ALUMINUM |
| Skirt Type | SOLID |
| Groove Taper Angle | 15 DEG INCL ANGLE |
| 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 |
|---|---|
| 166313 PRIMARY | Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN) |
| Reference | Meaning |
|---|---|
| 166313 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
NSN 2810-00-031-6323 is a Piston,internal Combustion Engin, 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 2810-00-031-6323 has 1 manufacturer part number on file: 166313 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.).
1 possible match (shared part number, not a government interchangeability claim): 5306-00-639-3033. Verify interchangeability with system specifications before substitution.
Key specifications for 166313: Overall Height: 4.110 INCHES NOMINAL IN; FSC Application Data: ACFT ENG R2000; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.12925 INCHES NOMINAL THIRD RING IN. 28 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.