The Ring,piston, cataloged under National Stock Number 2815-00-288-3656, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Fairbanks Morse, Llc. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 2815-00-288-3656 |
| Primary Part Number | CJB8C |
| Item Name | Ring,piston |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| Cross-Sectional Shape Style | PLAIN RECTANGULAR, STRAIGHT FACE |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.3750 INCHES MINIMUM AND 0.4100 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Surface Treatment | TIN OVERALL |
| Standard Bore Diameter | 12.000 INCHES IN |
| Material | IRON OVERALL |
| 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 |
|---|---|
| CJB8C PRIMARY | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| CJB8C | 3/9 Design control — primary reference U.S. Government activity |
NSN 2815-00-288-3656 is a Ring,piston, manufactured by Fairbanks Morse, Llc, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-288-3656 has 1 manufacturer part number on file: CJB8C (Fairbanks Morse, Llc).
Key specifications for CJB8C: Overall Width: 0.4910 INCHES MINIMUM AND 0.4920 INCHES MAXIMUM IN; Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE; Joint Style: VERTICAL JOINT; Radial Wall Thickness: 0.3750 INCHES MINIMUM AND 0.4100 INCHES MAXIMUM IN. 7 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.