# NSN 5310-01-160-5731: Washer, Recessed

NSN 5310-01-160-5731 (also written 5310011605731; NIIN 01-160-5731) is a washer, recessed in Federal Supply Class 5310, Nuts and Washers. 3 manufacturer part numbers from 3 suppliers are on record. It was last purchased in Oct 2026.

## Identification

- NSN: 5310-01-160-5731 (5310011605731)
- NIIN: 01-160-5731 (011605731)
- Item name: WASHER,RECESSED
- 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 2026-10-10)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAUB | HOLE DIAMETER | INCHES MINIMUM 0.191 AND INCHES MAXIMUM 0.195 |
| ABKV | OUTSIDE DIAMETER | INCHES MINIMUM 0.350 AND INCHES MAXIMUM 0.370 |
| ABMD | RECESS DIAMETER | INCHES MINIMUM 0.280 AND INCHES MAXIMUM 0.290 |
| ABPX | MATERIAL THICKNESS | INCHES MINIMUM 0.061 AND INCHES MAXIMUM 0.071 |
| CQFM | HARDNESS RATING | ROCKWELL C MINIMUM 40.0 AND ROCKWELL C MAXIMUM 45.0 |
| CSTM | RECESS ANGLE | DEGREES NOMINAL 90.0 |
| MATT | MATERIAL | OVERALL STEEL COMP XM-13 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | OVERALL ASSN STD SINGLE MATERIAL RESPONSE A-S 5629 |
| SFTT | SURFACE TREATMENT | OVERALL PASSIVATE |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | OVERALL FED SPEC SINGLE TREATMENT RESPONSE QQ--35 |
| STYL | STYLE DESIGNATOR | — |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| LD153-0027-1003 | 07632 | SERRA MANUFACTURING CORPORATION DBA SERRA MANUFACTURING | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| LD153-0027-1003 | 10630 | ANILLO INDUSTRIES LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| LD153-0027-1003 | 43999 | THE BOEING COMPANY DIV LEGACY AM&M | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-10-02 | [SPE4A626PL062](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310011605731) | WASHER, RECESSED | — | $4,825.00 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5310011605731&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310011605731
- 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/5310-01-160-5731/
JSON: https://nsnexplorer.com/api/nsn/5310-01-160-5731.json