Metric MARINE GRADE A4 Stainless Steel Square-Hole Oversized Washer for Carriage Bolts
The square hole on these fender washers is specifically designed to be used with Carriage Bolts and fasteners with square shafts. The square hole design provides a tight fit against the square collar of the carriage bolt and prevents it from rotating.
The oversized outer diameter of these washers distributes the load of the fastener over a wider area. Washers also provide a smooth bearing surface against the work surface, protecting it and preventing damage.
