The Piston,internal Combustion Engin, cataloged under National Stock Number 2805-00-678-3188, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-678-3188 |
| Primary Part Number | 5702226 |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.0955 INCHES MINIMUM AND 0.0965 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Width | 0.1880 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM THIRD RING IN |
| Ring Groove Width | 0.0955 INCHES MINIMUM AND 0.0965 INCHES MAXIMUM SECOND RING IN |
| Distance Between Pin Bosses | 3.180 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS 2409 ASSN STD SINGLE TREATMENT RESPONSE |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Skirt Slot Style | GROOVE CONVEX SLOT |
| Material Document and Classification | QQ-A-596, COMP A132, T-551 FED SPEC SINGLE MATERIAL RESPONSE |
| Diameter | 3.893 INCHES MINIMUM AND 3.895 INCHES MAXIMUM IN |
| Ring Groove Diameter | 3.434 INCHES MINIMUM AND 3.444 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Diameter | 3.447 INCHES MINIMUM AND 3.457 INCHES MAXIMUM SECOND RING IN |
| Distance From Pin Hole Center to Extreme Top | 1.858 INCHES MINIMUM AND 1.862 INCHES MAXIMUM IN |
| Pin | INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | NOT INCLUDED |
| Head Style | FLAT |
| Ring Groove Quantity | 3 |
| Oversize | 0.020 INCHES NOMINAL IN |
| Skirt Bottom Cutaway Feature | INCLUDED |
| Finished Size Designation | OVERSIZE |
| Ring | NOT INCLUDED |
| Surface Treatment | TIN |
| Pinhole Diameter | 0.9120 INCHES NOMINAL IN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | ALUMINUM ALLOY A332.0 |
| 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 |
|---|---|
| 5702226 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 2805-00-678-3188 is a Piston,internal Combustion Engin, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-678-3188 has 1 manufacturer part number on file: 5702226 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 5702226: Overall Height: 3.860 INCHES NOMINAL IN; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.0955 INCHES MINIMUM AND 0.0965 INCHES MAXIMUM FIRST RING IN; Ring Groove Width: 0.1880 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM 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.