# NSN 2815-01-502-8792: Spring, Expander, Piston Ring

NSN 2815-01-502-8792 (also written 2815015028792; NIIN 01-502-8792) is a spring, expander, piston ring in Federal Supply Class 2815, Diesel Engines and Components. 4 manufacturer part numbers from 4 suppliers are on record. It was last purchased in Aug 2026.

## Identification

- NSN: 2815-01-502-8792 (2815015028792)
- NIIN: 01-502-8792 (015028792)
- Item name: SPRING,EXPANDER,PISTON RING
- 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 R: the government owns neither the data nor the rights, and obtaining them is judged uneconomical. (observed 2026-10-28)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AGAV | END ITEM IDENTIFICATION | 2320-01-097-0260 TRUCK,CARGO; W/S TRUCK HEAVY EXPANDED MOBILITY TACTICAL (HEMTT); MRAP BUFFALO MK2A2 |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | SPRING ASSEMBLY, C2 PISTON RETURN |
| FEAT | SPECIAL FEATURES | USED ON HEMTT MODEL 977 WITH WINCH; GOES TO ROTATING CLUTCH WITHOUT POWER TAKE OFF FOUND ON TRANSMISSION FOR DETROIT DIESEL DEC IV ENGINE |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 29505719 | 64678 | DAIMLER TRUCK NORTH AMERICA LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 29505719 | 73342 | ALLISON TRANSMISSION INC DBA ALLISON TRANSMISSION, INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 5HA155 | 45152 | OSHKOSH CORP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 5HA155 | 75Q65 | OSHKOSH DEFENSE LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-08-27 | [SPE7L426D60XP/SPE7L026F6908](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=2815015028792) | SPRING, EXPANDER, PIS | — | $16,387.92 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=2815015028792&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=2815015028792
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- USAspending contract actions (each award above links to its record)
- 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/2815-01-502-8792/
JSON: https://nsnexplorer.com/api/nsn/2815-01-502-8792.json