# NSN 5310-01-105-0548: Washer, Convex

NSN 5310-01-105-0548 (also written 5310011050548; NIIN 01-105-0548) is a washer, convex in Federal Supply Class 5310, Nuts and Washers. 12 manufacturer part numbers from 8 suppliers are on record. It was last purchased in Sep 2026.

## Identification

- NSN: 5310-01-105-0548 (5310011050548)
- NIIN: 01-105-0548 (011050548)
- Item name: WASHER,CONVEX
- 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 2026-10-10)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAUB | HOLE DIAMETER | INCHES MINIMUM 0.198 AND INCHES MAXIMUM 0.208 |
| ABKV | OUTSIDE DIAMETER | INCHES MINIMUM 0.470 AND INCHES MAXIMUM 0.480 |
| ABPX | MATERIAL THICKNESS | INCHES MINIMUM 0.060 AND INCHES MAXIMUM 0.080 |
| CQBC | MINIMUM TENSILE STRENGTH | POUNDS PER SQUARE INCH 180000 |
| CQFM | HARDNESS RATING | ROCKWELL C MINIMUM 40.0 AND ROCKWELL C MAXIMUM 43.0 |
| CSYM | SURFACE FINISH | OUTER MICROINCHES 32.0 |
| FEAT | SPECIAL FEATURES | SHPERICAL RADIUS 0.365 IN. MIN,0.385 IN. MAX,COLOR NATURAL |
| MATT | MATERIAL | OVERALL STEEL COMP 630 |
| SFTT | SURFACE TREATMENT | OVERALL NICKEL AND CADMIUM |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | OVERALL ASSN STD SINGLE TREATMENT RESPONSE A-S 2416 |
| STYL | STYLE DESIGNATOR | — |
| ZZZK | SPECIFICATION/STANDARD DATA | MANUFACTURERS STANDARD 81205-BACW10CA |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 70188-3 | 56878 | SPS TECHNOLOGIES, LLC DBA PB FASTENERS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 70188-3 | 71838 | SPS TECHNOLOGIES AFG DIV | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 70188-3 | 80539 | SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP DIV AEROSPACE - SANTA ANA | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 942007-3 | 60119 | MONADNOCK COMPANY, THE DBA LISI AEROSPACE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| BACW10CA3CV | 15653 | HOWMET GLOBAL FASTENING SYSTEMS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| BACW10CA3CV | 56878 | SPS TECHNOLOGIES, LLC DBA PB FASTENERS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| BACW10CA3CV | 60119 | MONADNOCK COMPANY, THE DBA LISI AEROSPACE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| BACW10CA3CV | 80539 | SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP DIV AEROSPACE - SANTA ANA | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| BACW10CA3CV | 81205 | THE BOEING COMPANY DIV DEFENSE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| BACW10CA3CV | Z03F0 | BOEING DEFENCE AUSTRALIA LTD | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| BACW10CA3CV | Z8T75 | BOEING DEFENCE AUSTRALIA LTD DIV DEFENSE, SPACE & SECURITY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| K29646-3 | 15653 | HOWMET GLOBAL FASTENING SYSTEMS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Price history

Newest first.

| Date | Unit price | Quantity | Supplier | Agency | Source |
| --- | --- | --- | --- | --- | --- |
| 2026-09-28 | $0.67 | 376 | ALAMO AIRCRAFT, LTD. | — | [record](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310011050548) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-28 | [SPE4A626V408J](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310011050548) | WASHER, CONVEX | ALAMO AIRCRAFT, LTD. | $251.92 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5310011050548&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310011050548
- 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/5310-01-105-0548/
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