# NSN 5120-01-667-5052: Expander, Piston Ring

NSN 5120-01-667-5052 (also written 5120016675052; NIIN 01-667-5052) is an expander, piston ring in Federal Supply Class 5120, Hand Tools, Nonedged, Nonpowered. 2 manufacturer part numbers from 1 supplier are on record. It was last purchased in Sep 2026.

## Identification

- NSN: 5120-01-667-5052 (5120016675052)
- NIIN: 01-667-5052 (016675052)
- Item name: EXPANDER,PISTON RING
- Federal Supply Class: [FSC 5120 Hand Tools, Nonedged, Nonpowered](https://nsnexplorer.com/fsc/5120/)
- Federal Supply Group: [FSG 51](https://nsnexplorer.com/group/51/)
- Acquisition method suffix code: AMSC D: the data needed to compete the part is unavailable or cannot be obtained economically. (observed 2026-10-27)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AGAV | END ITEM IDENTIFICATION | CATERPILLAR ENGINES |
| FEAT | SPECIAL FEATURES | FOR 300MM ENGINE BORE |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 3184874 | 11083 | CATERPILLAR INC DIV CATERPILLAR DEFENSE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4C-8995 | 11083 | CATERPILLAR INC DIV CATERPILLAR DEFENSE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-03 | [SPE7L326P3871](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5120016675052) | EXPANDER, PISTON RIN | OHIO MACHINERY CO DBA OHIO CAT | $5,117.97 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5120016675052&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5120016675052
- 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.

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