Fender Washer Reference Guide
Fender Washers are built with a large O.D. creating an extra wide bearing surface. They're also built with thinner gauge metal than USS or SAE Washers.
Fender Washers are used where an extra wide bearing surface is required. They were built originally for auto body repair work, but now they're used for many different applications such as sheet metal work, plumbing, electrical work, attaching signs to signposts, installing drywall, wood paneling, many hobbies and craft projects, as well as in the Marine Industry.
Fender Washer Data-Sheets
Diameter Measurements
Bolt Size | Inside Diameter (± .010) | Outside Diameter (± .010) |
| 1/4" | 9/32" | 1" |
| 1/4" | 9/32" | 1-1/4" |
| 1/4" | 9/32" | 1-1/2" |
| 1/4" | 9/32" | 1-3/4" |
| 1/4" | 9/32" | 2" |
| 5/16" | 11/32" | 1" |
| 5/16" | 11/32" | 1-1/4" |
| 5/16" | 11/32" | 1-1/2" |
| 5/16" | 11/32" | 2" |
| 5/16" | 11/32" | 2-1/2" |
| 3/8" | 13/32" | 1-1/4" |
| 3/8" | 13/32" | 1-1/2" |
| 3/8" | 13/32" | 1-3/4" |
| 3/8" | 13/32" | 2" |
| 3/8" | 13/32" | 2-1/2" |
| 1/2" | 17/32" | 1-1/4" |
| 1/2" | 17/32" | 1-1/2" |
| 1/2" | 17/32" | 1-3/4" |
| 1/2" | 17/32" | 2" |
| 1/2" | 17/32" | 2-1/2" |
| 1/2" | 17/32" | 3" |
| 5/8" | 11/16" | 1-1/4" |
| 3/4" | 13/16" | 2 (± .015) |
| 7/8" | 15/16" | 2-1/2 (± .015) |
Fender Washer Thicknesses
Bolt Size | Minimum Thickness | Maximum Thickness |
| 1/4" | .080 | .051 |
| 1/4" | .080 | .051 |
| 1/4" | .080 | .051 |
| 1/4" | .080 | .051 |
| 1/4" | .080 | .051 |
| 5/16" | .080 | .051 |
| 5/16" | .080 | .051 |
| 5/16" | .080 | .051 |
| 5/16" | .080 | .051 |
| 5/16" | .080 | .051 |
| 3/8" | .080 | .051 |
| 3/8" | .080 | .051 |
| 3/8" | .080 | .051 |
| 3/8" | .080 | .051 |
| 3/8" | .080 | .051 |
| 1/2" | .080 | .051 |
| 1/2" | .080 | .051 |
| 1/2" | .080 | .051 |
| 1/2" | .080 | .051 |
| 1/2" | .080 | .051 |
| 1/2" | .080 | .051 |
| 5/8" | .084 | .074 |
| 3/4" | .080 | .051 |
| 7/8" | .118 | .101 |
Last Updated: Sep 17, 2019
Update History:
Sep 17, 2019 by bbasile from Calgary Fasteners
Dec 12, 2016 by jsjohnson from Calgary Fasteners
Jan 6, 2016 by jsjohnson from Calgary Fasteners
Jan 6, 2016 by jsjohnson from Calgary Fasteners
