The Piston,internal Combustion Engin, cataloged under National Stock Number 2815-00-863-5950, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Hatch and Kirk Inc Hk/ppi Div. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2815-00-863-5950 |
| Primary Part Number | P5ADHNSN |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Hatch and Kirk Inc Hk/ppi Div |
| Status | ACTIVE |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.1875 INCHES NOMINAL FOURTH RING IN |
| Ring Groove Width | 0.1875 INCHES NOMINAL FIFTH RING IN |
| Ring Groove Width | 0.2500 INCHES NOMINAL THIRD RING IN |
| Ring Groove Width | 0.2550 INCHES NOMINAL SECOND RING IN |
| Ring Groove Width | 0.2550 INCHES NOMINAL SIXTH RING IN |
| Ring Groove Width | 0.2570 INCHES NOMINAL FIRST RING IN |
| Retaining Ring Groove | NOT INCLUDED |
| Surface Finish | FINISHED |
| Ring Groove Position and Quantity | NUMBER 1,NUMBER 2,NUMBER 3,NUMBER 4,NUMBER 5,AND NUMBER 6 PISTON ALL RINGS |
| Supplementary Features | OIL PASSAGE HOLE |
| Diameter | 5.250 INCHES NOMINAL IN |
| Ring Groove Diameter | 4.755 INCHES NOMINAL SIXTH RING IN |
| Ring Groove Diameter | 4.769 INCHES NOMINAL FIFTH RING IN |
| Ring Groove Diameter | 4.769 INCHES NOMINAL FOURTH RING IN |
| Ring Groove Diameter | 4.800 INCHES NOMINAL FIRST RING IN |
| Ring Groove Diameter | 4.800 INCHES NOMINAL SECOND RING IN |
| Ring Groove Diameter | 4.800 INCHES NOMINAL THIRD RING IN |
| Distance From Pin Hole Center to Extreme Top | 5.088 INCHES NOMINAL IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | NOT INCLUDED |
| Head Style | CONCAVE |
| Ring Groove Quantity | 6 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Pinhole Diameter | 2.0000 INCHES NOMINAL IN |
| 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 |
|---|---|
| P5ADHNSN | Hatch and Kirk Inc Hk/ppi Div (USA) |
| Reference | Meaning |
|---|---|
| 5ADHNS | 3/9 Design control — primary reference U.S. Government activity |
| 5ADH-M-C | 5/9 Secondary reference U.S. Government activity |
| 5ADHNS | C/1 Advisory reference — outside the item-of-supply concept Fairbanks Morse, Llc |
NSN 2815-00-863-5950 is a Piston,internal Combustion Engin, manufactured by Hatch and Kirk Inc Hk/ppi Div, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-863-5950 has 1 manufacturer part number on file: P5ADHNSN (Hatch and Kirk Inc Hk/ppi Div).
Key specifications for P5ADHNSN: Overall Height: 8.400 INCHES NOMINAL IN; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.1875 INCHES NOMINAL FOURTH RING IN; Ring Groove Width: 0.1875 INCHES NOMINAL FIFTH 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.