Square Hole Washers



Square hole washers, also referred to as carriage bolt washers, are used on square neck carriage bolts and square shafts. The square hole allows for a tighter fit compared to a round hole that would need to be much larger to fit over the corners of the square shaft or bolt. The square hole also prevents the washer from rotating around the shaft or bolt, for a more secure fit.

Shop By
Material Finish Bolt Size (Metric) Bolt Size (Standard) Inside Diameter Outside Diameter Thickness Quantity in Stock Request a Quote
View Low Carbon Steel Plain 5/16 0.320 0.680 0.06 18210 Add to Quote
View Low Carbon Steel Zinc & Clear 5/16 0.320 0.680 0.06 4370 Add to Quote
View Nylon 5/16 0.320 0.687 0.062 5300 Add to Quote
View Low Carbon Steel Zinc & Clear 5/16 0.324 1.000 0.172 13500 Add to Quote
View Low Carbon Steel Zinc & Clear 5/16 0.325 0.675 0.053 15700 Add to Quote
View Low Carbon Steel Plain 5/16 0.325 0.740 0.06 3480 Add to Quote
View Low Carbon Steel Zinc & Yellow 5/16 0.325 0.740 0.06 0 Add to Quote
View Low Carbon Steel Zinc & Clear 5/16 0.325 0.740 0.06 5900 Add to Quote
View Stainless Steel - 300 Series Plain 5/16 0.325 0.740 0.06 25700 Add to Quote
View Low Carbon Steel Zinc & Clear M8 5/16 0.330 0.680 0.06 170 Add to Quote
View Low Carbon Steel Zinc & Clear M8 5/16 0.344 0.750 0.054 15400 Add to Quote
View Low Carbon Steel Zinc & Yellow M8 5/16 0.344 0.750 0.06 45252 Add to Quote

Customization and Material Options

Willie Washer offers square hole washers in various materials and finishes. We offer materials such as low carbon steel, spring steel, stainless steel, and some non-metallic materials for square hole washers. These parts are also available in a variety of finishes like zinc and yellow, zinc and clear, nickel, black oxide, and phosphate and oil. The different materials and finishes allow us to accommodate different environmental and structural requirements for your project.

Request a Quote for Square Hole Washers

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