# NSN 6620-01-521-9146: Diagnostic Unit, Engine

NSN 6620-01-521-9146 (also written 6620015219146; NIIN 01-521-9146) is a diagnostic unit, engine in Federal Supply Class 6620, Engine Instruments. 9 manufacturer part numbers from 3 suppliers are on record. It was last purchased in Oct 2026.

## Identification

- NSN: 6620-01-521-9146 (6620015219146)
- NIIN: 01-521-9146 (015219146)
- Item name: DIAGNOSTIC UNIT,ENGINE
- Federal Supply Class: [FSC 6620 Engine Instruments](https://nsnexplorer.com/fsc/6620/)
- Federal Supply Group: [FSG 66](https://nsnexplorer.com/group/66/)
- Acquisition method suffix code: AMSC B: must be bought from the sources named on a source control or selected item drawing. (observed 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAXX | MOUNTING TYPE | BASE SHOCK MOUNT |
| ACUR | DIRECT CURRENT VOLTAGE RATING IN VOLTS | 28.0 |
| AGAV | END ITEM IDENTIFICATION | F100-220/229 ENGINES |
| AMPS | CURRENT RATING IN AMPS | 0.3 |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | INTERCONNECTING BOX |
| FTLD | FUNCTIONAL DESCRIPTION | PROVIDED INTERCONNECTIVITY BETWEEN ENGINE SENSORS AND THE NEW DEEC WHICH WILL INCORPORATE THE FEATURES OF THE OLD EDUS. CANNOT BE USED UNTIL THE NEW DEEC IS INSTALLED. |
| PRPY | PROPRIETARY CHARACTERISTICS | PACS |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 4088024 | 77445 | RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 501220-2 | 59501 | UNISON INDUSTRIES LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 501220-7 | 59501 | UNISON INDUSTRIES LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 501220-8 | 59501 | UNISON INDUSTRIES LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 501220-9 | 59501 | UNISON INDUSTRIES LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 6620PL0737376 | 9009H | JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 6620PL1611653 | 9009H | JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 6620PL1611659 | 9009H | JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 6620PL1611660 | 9009H | JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-10-15 | [SPE4A520D0025/SPE4AX27F0959](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=6620015219146) | DIAGNOSTIC UNIT, ENGINE | UNISON INDUSTRIES LLC | $29,358.16 |
| 2026-09-17 | [SPE4A520D0025/SPE4AX26F481A](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=6620015219146) | DIAGNOSTIC UNIT, ENGINE | UNISON INDUSTRIES LLC | $146,790.80 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=6620015219146&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=6620015219146
- 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/6620-01-521-9146/
JSON: https://nsnexplorer.com/api/nsn/6620-01-521-9146.json