# NSN 5305-01-264-4188: Screw, Cap, Socket Head

NSN 5305-01-264-4188 (also written 5305012644188; NIIN 01-264-4188) is a screw, cap, socket head in Federal Supply Class 5305, Screws. 3 manufacturer part numbers from 2 suppliers are on record. The government has 1 open solicitation for it.

## Identification

- NSN: 5305-01-264-4188 (5305012644188)
- NIIN: 01-264-4188 (012644188)
- Item name: SCREW,CAP,SOCKET HEAD
- Federal Supply Class: [FSC 5305 Screws](https://nsnexplorer.com/fsc/5305/)
- Federal Supply Group: [FSG 53](https://nsnexplorer.com/group/53/)
- Acquisition method suffix code: AMSC P: the government does not own the rights to the data needed for more sources. (observed 2026-10-15)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | INCHES MINIMUM 1.260 |
| AASB | FASTENER LENGTH | INCHES NOMINAL 1.500 |
| AASK | HEAD STYLE | — |
| AASL | HEAD DIAMETER | INCHES NOMINAL 0.750 |
| AASU | HEAD HEIGHT | INCHES MINIMUM 0.485 AND INCHES MAXIMUM 0.515 |
| ABQZ | INTERNAL DRIVE STYLE | — |
| AHYM | NOMINAL THREAD DIAMETER | INCHES 0.500 |
| ASDB | WIDTH ACROSS FLATS | INCHES NOMINAL 0.375 |
| CMLP | THREAD QUANTITY PER INCH | 13 |
| MATT | MATERIAL | OVERALL STEEL COMP 4037 OR STEEL COMP 4140 OR STEEL COMP 4145 OR STEEL COMP 8735 OR STEEL COMP 8740 |
| THSD | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 649A916-191 | 01289 | GENERAL ELECTRIC COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 6643070-016 | 01289 | GENERAL ELECTRIC COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 6643070-016 | 17454 | TIMKEN GEARS & SERVICES INC. DBA PHILADELPHIA GEAR DIV TIMKEN POWER SYSTEMS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Open solicitations

| Solicitation | Quantity | Closes | Link |
| --- | --- | --- | --- |
| SPE4A6-27-T-4343 | 4 | 2026-10-22 | [DIBBS](https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5305012644188&category=nsn) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5305012644188&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5305012644188
- 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/5305-01-264-4188/
JSON: https://nsnexplorer.com/api/nsn/5305-01-264-4188.json