They re zinc plated steel for corrosion resistance in wet environments.
Square hole carriage bolt washer.
Some have a beveled edge that helps with shims spacers and reinforced attachments.
For technical drawings and 3 d models click on a part number.
Designed for use in wood with carriage bolts or other similar bolts.
Square neck bolt lock washers designed for use with square neck bolts such as carriage bolts these washers have teeth that dig into wood and other soft material to prevent rotation.
About 58 of these are bolts 28 are washers.
Prevents carriage bolt from spinning when nut is tightened.
The square holes also keep the carriage bolt washers from rotating in the square shaft.
A wide variety of square hole carriage bolt washer options are available to you such as application material and standard.
Square washers also called blind rivet washers distribute loads when fastening bolts and screws in clamping and other fixing applications.
Special washer with a square hole.
Made of zinc plated steel.
About product and suppliers.
A square washer can be made of stainless steel brass steel or other material and may have a zinc finish or electro galvanized plating for environmental protection.