# NSN 2815-00-278-1538: Ring, Piston

NSN 2815-00-278-1538 (also written 2815002781538; NIIN 00-278-1538) is a ring, piston in Federal Supply Class 2815, Diesel Engines and Components. 3 manufacturer part numbers from 1 supplier are on record. No purchases are on record yet.

## Identification

- NSN: 2815-00-278-1538 (2815002781538)
- NIIN: 00-278-1538 (002781538)
- Item name: RING,PISTON
- Federal Supply Class: [FSC 2815 Diesel Engines and Components](https://nsnexplorer.com/fsc/2815/)
- Federal Supply Group: [FSG 28](https://nsnexplorer.com/group/28/)
- Acquisition method suffix code: AMSC H: the government lacks sufficient, accurate or legible data to buy from other sources. (observed 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ACXZ | STANDARD BORE DIAMETER | INCHES 15.500 |
| ACXD | RING STYLE | — |
| ACXJ | OVERALL WIDTH | INCHES MINIMUM 0.2445 AND INCHES MAXIMUM 0.2460 |
| SFTT | SURFACE TREATMENT | OVERALL CHROMIUM |
| ACXF | RADIAL WALL THICKNESS | INCHES MINIMUM 0.4600 AND INCHES MAXIMUM 0.4800 |
| AAGR | CROSS-SECTIONAL SHAPE STYLE | — |
| ADTE | JOINT STYLE | — |
| FEAT | SPECIAL FEATURES | TOP OF ID OF RING CHAMFERED 60 DEG BY 0.125 TO 0.135 IN.DEEP |
| MATT | MATERIAL | OVERALL IRON |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 2-23R-009-001 | 14541 | COOPER MACHINERY SERVICES LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| SF-296-16 | 14541 | COOPER MACHINERY SERVICES LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| SF296-16D15-1-2 | 14541 | COOPER MACHINERY SERVICES LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=2815002781538&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=2815002781538
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- All data is public U.S. government data; every row above links to its source record where one exists.

Canonical page: https://nsnexplorer.com/nsn/2815-00-278-1538/
JSON: https://nsnexplorer.com/api/nsn/2815-00-278-1538.json