# NSN 4420-01-504-9052: Tightening Bolt Ay

NSN 4420-01-504-9052 (also written 4420015049052; NIIN 01-504-9052) is a tightening bolt ay in Federal Supply Class 4420, Heat Exchangers and Steam Condensers. 6 manufacturer part numbers from 3 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 4420-01-504-9052 (4420015049052)
- NIIN: 01-504-9052 (015049052)
- Item name: TIGHTENING BOLT AY
- 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 D: the data needed to compete the part is unavailable or cannot be obtained economically. (observed 2026-10-23)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AGAV | END ITEM IDENTIFICATION | PF 42 CENTRAL FRESH WATER COOLER |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | STAYBOLT TIGHTENING ASSEMBLY |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 4-669-24-200-010 | 51900 | ITT CORPORATION DBA ITT STANDARD | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4-669-24-200-010 | 6JUY0 | XYLEM INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4-669-24-200-010 | 6LE50 | FLUID HANDLING LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4-750-31-131-001 | 51900 | ITT CORPORATION DBA ITT STANDARD | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4-750-31-131-001 PC NO.4 | 51900 | ITT CORPORATION DBA ITT STANDARD | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4-750-31-131-001 PC NO.4 | 6LE50 | FLUID HANDLING 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=4420015049052&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4420015049052
- 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/4420-01-504-9052/
JSON: https://nsnexplorer.com/api/nsn/4420-01-504-9052.json