# NSN 5310-01-631-2890: Nut, Plain, Extended Washer, Hexago

NSN 5310-01-631-2890 (also written 5310016312890; NIIN 01-631-2890) is a nut, plain, extended washer, hexago in Federal Supply Class 5310, Nuts and Washers. 1 manufacturer part number from 1 supplier is on record. No purchases are on record yet.

## Identification

- NSN: 5310-01-631-2890 (5310016312890)
- NIIN: 01-631-2890 (016312890)
- Item name: NUT,PLAIN,EXTENDED WASHER,HEXAGO
- 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 H: the government lacks sufficient, accurate or legible data to buy from other sources. (observed 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAJD | THREAD CLASS | 2B |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| ABKW | OVERALL HEIGHT | INCHES MINIMUM 0.330 AND INCHES MAXIMUM 0.347 |
| ADEM | WASHER THICKNESS | INCHES MINIMUM 0.040 |
| ASDB | WIDTH ACROSS FLATS | INCHES MINIMUM 0.728 AND INCHES MAXIMUM 0.750 |
| BZRR | THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |
| CMLP | THREAD QUANTITY PER INCH | 16 |
| CQJX | NOMINAL THREAD SIZE | INCHES 0.375 |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | SERRATED HEX FLANGE NUT |
| MATT | MATERIAL | OVERALL STEEL |
| SFTT | SURFACE TREATMENT | OVERALL ZINC |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 1137341 | 0Y3H3 | FASTENAL COMPANY DBA FASTENAL CO | [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=5310016312890&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310016312890
- 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/5310-01-631-2890/
JSON: https://nsnexplorer.com/api/nsn/5310-01-631-2890.json