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.

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Material Finish Bolt Size (Metric) Bolt Size (Standard) Inside Diameter Outside Diameter Thickness Quantity in Stock Request a Quote
View Low Carbon Steel Plain M3 4 0.132 0.312 0.03 25500 Add to Quote
View Low Carbon Steel Plain 8 0.188 0.375 0.03 28200 Add to Quote
View Low Carbon Steel Plain 12 0.226 0.500 0.048 23200 Add to Quote
View Low Carbon Steel Zinc & Clear 12 0.226 0.500 0.048 3700 Add to Quote
View Stainless Steel - 300 Series Plain M6 1/4 0.260 0.825 0.057 2400 Add to Quote
View Low Carbon Steel Zinc & Black M6 1/4 0.265 0.690 0.036 23100 Add to Quote
View Low Carbon Steel Zinc & Clear 1/4 0.281 0.500 0.03 3350 Add to Quote
View Low Carbon Steel Zinc & Clear 1/4 0.281 1.000 0.06 0 Add to Quote
View Low Carbon Steel Zinc & Yellow 1/4 0.283 0.862 0.036 111500 Add to Quote
View Low Carbon Steel Zinc & Clear 1/4 0.283 0.862 0.036 0 Add to Quote
View Low Carbon Steel Zinc & Clear 1/4 0.312 1.000 0.172 4750 Add to Quote
View PTFE 1/4 0.312 0.500 0.02 4401 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.

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