# NSN 5305-01-284-9678: Screw, Cap, Socket Head

NSN 5305-01-284-9678 (also written 5305012849678; NIIN 01-284-9678) is a screw, cap, socket head in Federal Supply Class 5305, Screws. 6 manufacturer part numbers from 5 suppliers are on record. It was last purchased in Sep 2026.

## Identification

- NSN: 5305-01-284-9678 (5305012849678)
- NIIN: 01-284-9678 (012849678)
- 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 G: the government has a complete data package and the rights to use it. (observed 2026-10-10)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAJD | THREAD CLASS | 2A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | INCHES MINIMUM 2.750 AND INCHES MAXIMUM 2.938 |
| AASB | FASTENER LENGTH | INCHES MINIMUM 4.812 AND INCHES MAXIMUM 5.000 |
| AASK | HEAD STYLE | — |
| AASU | HEAD HEIGHT | INCHES MINIMUM 0.749 AND INCHES MAXIMUM 0.813 |
| AATB | WIDTH BETWEEN FLATS | INCHES MINIMUM 1.812 AND INCHES MAXIMUM 1.875 |
| AAUM | LOCKING FEATURE | THREADS PATCH OR STRIP |
| ABQZ | INTERNAL DRIVE STYLE | — |
| AHYM | NOMINAL THREAD DIAMETER | INCHES 1.250 |
| CMLP | THREAD QUANTITY PER INCH | 12 |
| CQBC | MINIMUM TENSILE STRENGTH | POUNDS PER SQUARE INCH 150000 |
| CQFM | HARDNESS RATING | FASTENER ROCKWELL C MINIMUM 32.0 AND ROCKWELL C MAXIMUM 38.0 |
| MATT | MATERIAL | FASTENER STEEL |
| MATT | MATERIAL | LOCKING FEATURE PLASTIC POLYAMIDE NYLON |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | FASTENER ASSN STD SINGLE MATERIAL RESPONSE SAE J429 GR 8 |
| SFTT | SURFACE TREATMENT | FASTENER CADMIUM AND CHROMATE |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | FASTENER FED SPEC SINGLE TREATMENT RESPONSE QQ--416 TY 2 CL 3 |
| THSD | THREAD SERIES DESIGNATOR | UNF |
| ZZZT | NONDEFINITIVE SPEC/STD DATA | TYPE 2 AND STYLE 10 AND GRADE 8 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| B1821BH125F500L | 05047 | THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| FF-S-85C TYPE II STYLE 10P | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| M18240 1.250-12UNF-2A 5.000LG | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| MIL-F-18240,C0N F-B HEX HEAD | D9182 | ZF INDUSTRIEANTRIEBE WITTEN GMBH | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| MIL-F-18240,CONF-B HEX HEAD | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| MS90727-281L | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Price history

Newest first.

| Date | Unit price | Quantity | Supplier | Agency | Source |
| --- | --- | --- | --- | --- | --- |
| 2026-09-14 | $651.17 | 2 | KAREN CARLISLE DBA B & K AEROSPACE | — | [record](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5305012849678) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5305012849678&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5305012849678
- 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/5305-01-284-9678/
JSON: https://nsnexplorer.com/api/nsn/5305-01-284-9678.json