The Piston,internal Combustion Engin, cataloged under National Stock Number 2810-00-920-1044, 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 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2810-00-920-1044 |
| Primary Part Number | 272916R2 |
| 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 |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.0965 INCHES MINIMUM AND 0.0975 INCHES MAXIMUM THIRD RING IN |
| Ring Groove Width | 0.0985 INCHES MINIMUM AND 0.0995 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Width | 0.1295 INCHES MINIMUM AND 0.1305 INCHES MAXIMUM FIRST RING IN |
| Distance Between Pin Bosses | 3.469 INCHES NOMINAL IN |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | SEMIFINISHED |
| Diameter | 5.717 INCHES MINIMUM AND 5.719 INCHES MAXIMUM IN |
| Ring Groove Diameter | 5.164 INCHES MINIMUM AND 5.174 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Diameter | 5.182 INCHES MINIMUM AND 5.202 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Diameter | 5.182 INCHES MINIMUM AND 5.202 INCHES MAXIMUM THIRD RING IN |
| Distance From Pin Hole Center to Extreme Top | 2.343 INCHES MINIMUM AND 2.353 INCHES MAXIMUM IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | INCLUDED |
| Head Style | FLAT |
| Ring Groove Quantity | 3 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Ring | NOT INCLUDED |
| Pinhole Diameter | 1.3727 INCHES MINIMUM AND 1.3733 INCHES MAXIMUM IN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | ALUMINUM ALLOY |
| Skirt Type | SOLID |
| 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 |
|---|---|
| 272916R2 PRIMARY | Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN) |
| 72916 | Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN) |
| Reference | Meaning |
|---|---|
| 72916 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
NSN 2810-00-920-1044 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 2810-00-920-1044 has 2 manufacturer part numbers on file: 272916R2 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.), 72916 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.).
2 possible matches (shared part number, not a government interchangeability claim): 5340-01-004-8094, 5905-01-231-2462. Verify interchangeability with system specifications before substitution.
Key specifications for 272916R2: Overall Height: 4.268 INCHES NOMINAL IN; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.0965 INCHES MINIMUM AND 0.0975 INCHES MAXIMUM THIRD RING IN; Ring Groove Width: 0.0985 INCHES MINIMUM AND 0.0995 INCHES MAXIMUM SECOND RING IN. 23 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.