# NSN 5310-00-151-5431: Nut, Self-Locking, Assembled Washe

NSN 5310-00-151-5431 (also written 5310001515431; NIIN 00-151-5431) is a nut, self-locking, assembled washe in Federal Supply Class 5310, Nuts and Washers. 6 manufacturer part numbers from 6 suppliers are on record. It was last purchased in Aug 2026.

## Identification

- NSN: 5310-00-151-5431 (5310001515431)
- NIIN: 00-151-5431 (001515431)
- Item name: NUT,SELF-LOCKING,ASSEMBLED WASHE
- 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 2026-11-02)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| CMLP | THREAD QUANTITY PER INCH | 28 |
| BZRR | THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |
| ABKW | OVERALL HEIGHT | INCHES MINIMUM 0.375 AND INCHES MAXIMUM 0.405 |
| ACTA | NUT STYLE | — |
| ADEA | NUT HEIGHT | INCHES MINIMUM 0.125 |
| ADFK | NUT COUNTERBORE DEPTH | NUT INCHES MINIMUM 0.172 AND INCHES MAXIMUM 0.192 |
| ASDB | WIDTH ACROSS FLATS | INCHES MINIMUM 0.430 AND INCHES MAXIMUM 0.439 |
| AZKQ | TEMP RATING | FAHRENHEIT MAXIMUM 250.0 |
| AAJD | THREAD CLASS | 3B |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AAUM | LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| AAVX | WASHER OUTSIDE DIAMETER | INCHES MINIMUM 0.530 AND INCHES MAXIMUM 0.560 |
| AAWY | COUNTERBORE DIAMETER | NUT INCHES MINIMUM 0.299 AND INCHES MAXIMUM 0.309 |
| MATT | MATERIAL | LOCKING INSERT PLASTIC NYLON |
| MATT | MATERIAL | NUT STEEL COMP 1137 OR STEEL COMP 11L37 OR STEEL COMP 8740 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | NUT ASSN STD 1ST MATERIAL RESPONSE A-S 5024 OR ASSN STD 2ND MATERIAL RESPONSE A-S 5020 OR ASSN STD 3RD MATERIAL RESPONSE A-S 6322 OR ASSN STD 3RD MATERIAL RESPONSE A-S 6323 OR ASSN STD 3RD MATERIAL RESPONSE A-S 6325 OR ASSN STD 3RD MATERIAL RESPONSE A-S 6327 OR ASSN STD 3RD MATERIAL RESPONSE A-S 6358 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | WASHER FED SPEC 1ST MATERIAL RESPONSE QQ-A-225 TO 6,T4 OR FED SPEC 2ND MATERIAL RESPONSE QQ-A-250 TO 13,T6 |
| SFTT | SURFACE TREATMENT | NUT CADMIUM AND CHROMATE |
| SFTT | SURFACE TREATMENT | WASHER CHROMATE |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | NUT FED SPEC SINGLE TREATMENT RESPONSE QQ--416,TY 2,CL 2 |
| CSXL | BEARING SURFACE FINISH | MICROINCHES 125.0 |
| CQJX | NOMINAL THREAD SIZE | INCHES 0.250 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| F12N7699-428 | 27687 | GREER STOP NUT, INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| MS21224-4 | 80205 | NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| MS21224-4 | 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/) |
| MS21224-4 | A0126 | LEONARDO SPA HELICOPTERS DIVISION - PRODUCTION SITE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| MS21224-4 | A0170 | LEONARDO SPA AERONAUTICS DIVISION - POMIGLIANO D'ARCO SITE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| NE8235-4 | 72962 | HARVARD INDUSTRIES INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-08-20 | [SPE4A726D0423](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310001515431) | NUT, SELF-LOCKING, AS | — | $700,000.00 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5310001515431&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310001515431
- 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/5310-00-151-5431/
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