# NSN 5310-00-345-3221: Nut, Self-Locking, Round

NSN 5310-00-345-3221 (also written 5310003453221; NIIN 00-345-3221) is a nut, self-locking, round in Federal Supply Class 5310, Nuts and Washers. 3 manufacturer part numbers from 3 suppliers are on record. It was last purchased in Nov 2026.

## Identification

- NSN: 5310-00-345-3221 (5310003453221)
- NIIN: 00-345-3221 (003453221)
- Item name: NUT,SELF-LOCKING,ROUND
- 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 Q: the government lacks adequate data or rights, but breakout to competition is expected. (observed 2026-10-23)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| FEAT | SPECIAL FEATURES | DRIVE POINT 0.062 IN. DIA,0.047 IN. DEEP |
| MATT | MATERIAL | OVERALL ALUMINUM ALLOY |
| CQJX | NOMINAL THREAD SIZE | INCHES 0.375 |
| BZRR | THREAD SERIES | UNF |
| AAUM | LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| ASDB | WIDTH ACROSS FLATS | INCHES NOMINAL 0.469 |
| ADBG | NUT THICKNESS | INCHES NOMINAL 0.219 |
| CMLP | THREAD QUANTITY PER INCH | 24 |
| ACTD | NUT DIAMETER | INCHES NOMINAL 0.625 |
| ACTA | NUT STYLE | — |
| AAJD | THREAD CLASS | 2B |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 95540 | 2N935 | BOEING DISTRIBUTION SERVICES X, INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 95540 | 70210 | HONEYWELL INTERNATIONAL INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 95540 | 72599 | ALLIEDSIGNAL INC DBA ALLIED-SIGNAL AEROSPACE CO | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Price history

Newest first.

| Date | Unit price | Quantity | Supplier | Agency | Source |
| --- | --- | --- | --- | --- | --- |
| 2026-11-04 | $134.00 | 13 | BOEING DISTRIBUTION SERVICES X, INC. | — | [record](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310003453221) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-11-04 | [SPE4A627P3970](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310003453221) | NUT, SELF-LOCKING, ROUND | BOEING DISTRIBUTION SERVICES X, INC. | $1,742.00 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5310003453221&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310003453221
- 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/5310-00-345-3221/
JSON: https://nsnexplorer.com/api/nsn/5310-00-345-3221.json