The Piston,internal Combustion Engin, cataloged under National Stock Number 2815-00-397-3316, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Tecmotiv (usa), Inc.. Government technical data includes 26 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 2815-00-397-3316 |
| Primary Part Number | 11683943 |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Tecmotiv (usa), Inc. |
| Status | ACTIVE |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.1880 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM FOURTH RING IN |
| Ring Groove Width | 0.0980 INCHES MINIMUM AND 0.0990 INCHES MAXIMUM THIRD RING IN |
| Ring Groove Width | 0.0990 INCHES MINIMUM AND 0.1000 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Width | 0.0995 INCHES MINIMUM AND 0.1005 INCHES MAXIMUM FIRST RING IN |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Diameter | 5.741 INCHES MINIMUM AND 5.742 INCHES MAXIMUM IN |
| Ring Groove Diameter | 5.169 INCHES MINIMUM AND 5.179 INCHES MAXIMUM FOURTH RING IN |
| Ring Groove Diameter | 5.187 INCHES MINIMUM AND 5.192 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Diameter | 5.210 INCHES MINIMUM AND 5.220 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Diameter | 5.210 INCHES MINIMUM AND 5.220 INCHES MAXIMUM THIRD RING IN |
| Distance From Pin Hole Center to Extreme Top | 4.344 INCHES MINIMUM AND 4.354 INCHES MAXIMUM IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | NOT INCLUDED |
| Head Style | CAVITY |
| Ring Groove Quantity | 4 |
| Skirt Bottom Cutaway Feature | INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Pinhole Diameter | 2.1268 INCHES MINIMUM AND 2.1270 INCHES MAXIMUM IN |
| Pin Hole Bushing | NOT INCLUDED |
| Skirt Type | SOLID |
| Groove Taper Angle | 7 DEGREE 25 MINUTES PORM 5 MINUTES NUMBER 1 |
| Cut Depth | 0.380 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 |
|---|---|
| 11683943 PRIMARY | Tecmotiv (usa), Inc. (USA) |
| 11683943 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 11683943 | 5/9 Secondary reference Brighton Cromwell Llc |
| 655216 | 5/9 Secondary reference Renk America Llc Div Renk America |
| 11683943 | 5/9 Secondary reference Mactek Industries Corp |
| 11683943 | 5/9 Secondary reference Renk America Llc Div Renk America |
| 2815003973316 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 11683943 | 5/9 Secondary reference Minowitz Manufacturing Co. |
NSN 2815-00-397-3316 is a Piston,internal Combustion Engin, manufactured by Tecmotiv (usa), Inc., classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-397-3316 has 2 manufacturer part numbers on file: 11683943 (Tecmotiv (usa), Inc.), 11683943 (U S Army Tank Automotive Command Amsta-Im-Mm).
5 possible matches (shared part number, not a government interchangeability claim): 2815-00-427-0551, 2815-00-427-0553, 2815-00-434-6593. Verify interchangeability with system specifications before substitution.
Key specifications for 11683943: Overall Height: 6.464 INCHES MINIMUM AND 6.474 INCHES MAXIMUM IN; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.1880 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM FOURTH RING IN; Ring Groove Width: 0.0980 INCHES MINIMUM AND 0.0990 INCHES MAXIMUM THIRD RING IN. 26 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.