The Pin,piston, cataloged under National Stock Number 2815-00-377-2804, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Cooper Machinery Services Llc. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2815-00-377-2804 |
| Primary Part Number | 3A-2578-X |
| Item Name | Pin,piston |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Cooper Machinery Services Llc |
| Status | ACTIVE |
| Body Style | PLAIN ENDS |
| Hole Arrangement Style | TWO HOLES THRU PIN |
| Bore Style | SOLID CENTER |
| First Hole Diameter | 0.188 INCHES NOMINAL IN |
| Outside Diameter | 3.26560 INCHES NOMINAL IN |
| Bore Depth | 0.500 INCHES NOMINAL IN |
| Second Hole Diameter | 0.188 INCHES NOMINAL IN |
| Body Length | 7.6250 INCHES NOMINAL IN |
| Center to Center Distance Between Holes | 2.3675 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Bore Diameter | 1.5000 INCHES NOMINAL IN |
| Material | STEEL |
| Distance From Centerline of Hole to End of Pin | 1.150 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 |
|---|---|
| 3A-2578-X PRIMARY | Cooper Machinery Services Llc (USA) |
| Reference | Meaning |
|---|---|
| 3A2578X | 5/9 Secondary reference Cooper Cameron Corp Ajax-Superior Div |
NSN 2815-00-377-2804 is a Pin,piston, manufactured by Cooper Machinery Services Llc, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-377-2804 has 1 manufacturer part number on file: 3A-2578-X (Cooper Machinery Services Llc).
Key specifications for 3A-2578-X: Body Style: PLAIN ENDS; Hole Arrangement Style: TWO HOLES THRU PIN; Bore Style: SOLID CENTER; First Hole Diameter: 0.188 INCHES NOMINAL IN. 13 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.