The Cylinder Sleeve, cataloged under National Stock Number 2815-00-338-7956, 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 16 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 2815-00-338-7956 |
| Primary Part Number | 7657 |
| Item Name | Cylinder Sleeve |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Cooper Machinery Services Llc |
| Status | ACTIVE |
| Chamfer Length | 0.125 INCHES NOMINAL IN |
| Bottom Chamfer Length | 0.125 INCHES NOMINAL IN |
| Flange Thickness | 1.506 INCHES NOMINAL IN |
| Design Type | DRY |
| Body Outside Diameter | 13.608 INCHES NOMINAL IN |
| Top Intake Port | NOT INCLUDED |
| Style Designator | DRY, FLANGED, RELIEVED |
| Top Inside Chamfer | INCLUDED |
| Valve Recess | NOT INCLUDED |
| Intake Hole | NOT INCLUDED |
| Chamfer Angle in Deg | 30.0 |
| Bottom Inside Chamfer | INCLUDED |
| Bore Diameter | 13.562 INCHES NOMINAL IN |
| Material | STEEL |
| Flange Outside Diameter | 13.871 INCHES NOMINAL IN |
| Bottom Chamfer Angle in Deg | 30.0 |
| 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 |
|---|---|
| 82514S4105-10184H75EEF10098 | Naval Sea Systems Command (USA) |
| 7657 PRIMARY | Cooper Machinery Services Llc (USA) |
| 82514S4105-10185H75EEF10098 | Naval Sea Systems Command (USA) |
| 82514S4105-10184PC8 | Naval Sea Systems Command (USA) |
| 82514S4105-10185PC8 | Naval Sea Systems Command (USA) |
| 82514S4105-677431PC1 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 82514S4105-10185PC8 | 5/9 Secondary reference U.S. Government activity |
| 82514S4105-57461H75EEF10098 | 5/2 Secondary reference U.S. Government activity |
| 1112004 | 5/9 Secondary reference Hunt-Spiller Mfg Corp |
| 82514S4105-10185H75EEF10098 | 5/9 Secondary reference U.S. Government activity |
| 82514S4105-574515PC16 | 5/2 Secondary reference U.S. Government activity |
| 71015PC8 | 5/9 Secondary reference Cooper Machinery Services Llc |
| 82514S4105-677431PC1 | 5/9 Secondary reference U.S. Government activity |
| 82514S4105-10184H75EEF10098 | 5/9 Secondary reference U.S. Government activity |
| 82514S4105-574517PC16 | 5/2 Secondary reference U.S. Government activity |
| 82514S4105-574619PC1 | 5/2 Secondary reference U.S. Government activity |
| 82514S4105-67743H75EEF10098 | 5/2 Secondary reference U.S. Government activity |
| 82514S4105-10184PC8 | 5/9 Secondary reference U.S. Government activity |
| 82514S4105-57451H75EEF10098 | 5/2 Secondary reference U.S. Government activity |
| 72015PC8 | 5/9 Secondary reference Cooper Machinery Services Llc |
NSN 2815-00-338-7956 is a Cylinder Sleeve, manufactured by Cooper Machinery Services Llc, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-338-7956 has 6 manufacturer part numbers on file: 82514S4105-10184H75EEF10098 (Naval Sea Systems Command), 7657 (Cooper Machinery Services Llc), 82514S4105-10185H75EEF10098 (Naval Sea Systems Command), 82514S4105-10184PC8 (Naval Sea Systems Command), 82514S4105-10185PC8 (Naval Sea Systems Command) and 1 more.
4 possible matches (shared part number, not a government interchangeability claim): 6145-00-845-5957, 5910-01-129-3514, 5130-01-159-9299. Verify interchangeability with system specifications before substitution.
Key specifications for 7657: Chamfer Length: 0.125 INCHES NOMINAL IN; Bottom Chamfer Length: 0.125 INCHES NOMINAL IN; Flange Thickness: 1.506 INCHES NOMINAL IN; Design Type: DRY. 16 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.