# NSN 5310-00-543-2122: Nut, Plain, Castellated, Hexagon

NSN 5310-00-543-2122 (also written 5310005432122; NIIN 00-543-2122) is a nut, plain, castellated, hexagon in Federal Supply Class 5310, Nuts and Washers. 2 manufacturer part numbers from 1 supplier are on record. It was last purchased in Oct 2026.

## Identification

- NSN: 5310-00-543-2122 (5310005432122)
- NIIN: 00-543-2122 (005432122)
- Item name: NUT,PLAIN,CASTELLATED,HEXAGON
- Federal Supply Class: [FSC 5310 Nuts and Washers](https://nsnexplorer.com/fsc/5310/)
- 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 2026-11-01)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| CMLP | THREAD QUANTITY PER INCH | 20 |
| ZZZT | NONDEFINITIVE SPEC/STD DATA | TYPE A4 |
| CRTM | BEARING SURFACE TYPE | WASHER FACED |
| CQJX | NOMINAL THREAD SIZE | INCHES 0.250 |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| ACTA | NUT STYLE | — |
| SFTT | SURFACE TREATMENT | OVERALL CADMIUM |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | OVERALL FED SPEC SINGLE TREATMENT RESPONSE QQ--416,TY 2,CL 3 |
| ZZZX | DEPARTURE FROM CITED DESIGNATOR | AS MODIFIED BY COARSE THD |
| BZRR | THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |
| MATT | MATERIAL | OVERALL STEEL |
| ADEA | NUT HEIGHT | INCHES MINIMUM 0.275 AND INCHES MAXIMUM 0.288 |
| ASDB | WIDTH ACROSS FLATS | INCHES MINIMUM 0.428 AND INCHES MAXIMUM 0.437 |
| AAJD | THREAD CLASS | 2B |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| FF-B-575 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| FFB571TYPEA4 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-10-29 | [SPE4A627P4187](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310005432122) | NUT, PLAIN, CASTELLAT | FABRICATION SPECIALTY INC DBA FABRICATION SPECIALTY INC | $360.22 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5310005432122&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310005432122
- 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/5310-00-543-2122/
JSON: https://nsnexplorer.com/api/nsn/5310-00-543-2122.json