# NSN 4420-01-168-6371: Riser, Steam, Heater

NSN 4420-01-168-6371 (also written 4420011686371; NIIN 01-168-6371) is a riser, steam, heater in Federal Supply Class 4420, Heat Exchangers and Steam Condensers. 2 manufacturer part numbers from 1 supplier are on record. It was last purchased in Oct 2026.

## Identification

- NSN: 4420-01-168-6371 (4420011686371)
- NIIN: 01-168-6371 (011686371)
- Item name: RISER,STEAM,HEATER
- Federal Supply Class: [FSC 4420 Heat Exchangers and Steam Condensers](https://nsnexplorer.com/fsc/4420/)
- Federal Supply Group: [FSG 44](https://nsnexplorer.com/group/44/)
- Acquisition method suffix code: AMSC L: annual buy value is below the screening threshold. (observed 2026-11-01)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AGAV | END ITEM IDENTIFICATION | AERCO INTERNATIONAL HEATER MODEL SW1B06 |
| TEXT | GENERAL CHARACTERISTICS ITEM DESCRIPTION | 32.875 IN. O/A LG; 6 HOLES DRILLED 0.812 DIA; ONE END THREADED 2-11 1/2 NPT; SECOND END HAS 2.092 IN. INTERNAL SOCKET SPACED 0.500 IN. FROM END |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| NAVY-8559 | 95368 | AERCO INTERNATIONAL, INC. DBA AERCO INTERNATIONAL INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| RB-546 | 95368 | AERCO INTERNATIONAL, INC. DBA AERCO INTERNATIONAL INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-10-28 | [SPE8E927P0121](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4420011686371) | RISER, STEAM, HEATER | PIONEER INDUSTRIES, LLC | $20,066.70 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4420011686371&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4420011686371
- 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/4420-01-168-6371/
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