# NSN 5310-00-131-2665: Washer, Flat

NSN 5310-00-131-2665 (also written 5310001312665; NIIN 00-131-2665) is a washer, flat in Federal Supply Class 5310, Nuts and Washers. 2 manufacturer part numbers from 1 supplier are on record. It was last purchased in Aug 2026.

## Identification

- NSN: 5310-00-131-2665 (5310001312665)
- NIIN: 00-131-2665 (001312665)
- Item name: WASHER,FLAT
- 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 C: needs engineering source approval; other sources must qualify first. (observed 2026-11-06)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | OVERALL MIL SPEC 1ST MATERIAL RESPONSE -IL-S-7952 AND ASSN STD 2ND MATERIAL RESPONSE AISI AND MIL SPEC 3RD MATERIAL RESPONSE -IL-S-18729,COND N |
| CSYM | SURFACE FINISH | BOTTOM MICROINCHES 32.0 |
| MATT | MATERIAL | OVERALL STEEL OR STEEL COMP 1018 OR STEEL COMP 4130 |
| ABNM | THICKNESS | INCHES NOMINAL 0.063 |
| ADAV | OVERALL DIAMETER | INCHES MINIMUM 0.495 AND INCHES MAXIMUM 0.520 |
| CQBC | MINIMUM TENSILE STRENGTH | POUNDS PER SQUARE INCH 55000 |
| AAGR | CROSS-SECTIONAL SHAPE STYLE | — |
| AAUB | HOLE DIAMETER | INCHES MINIMUM 0.252 AND INCHES MAXIMUM 0.258 |
| ABMW | PERIPHERAL SHAPE STYLE | — |
| ABMX | CENTER HOLE SHAPE STYLE | — |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 206-040-329-003 | 97499 | BELL TEXTRON INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 206-040-329-3 | 97499 | BELL TEXTRON INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-08-10 | [SPRPA121G001W/SPE4A626F280G](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310001312665) | WAS HER, FLAT | BELL TEXTRON INC | $22,986.04 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5310001312665&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310001312665
- 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/5310-00-131-2665/
JSON: https://nsnexplorer.com/api/nsn/5310-00-131-2665.json