12/12 Flat Bottom Washers (1/4” hole) are suitable for #14 and 1/4" pan head, round head, and other "flat bottomed" fasteners. Will snap to 12/12 caps. Simply place the 12/12-CSK washer on your work surface, screw your screw into the washer...
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Quality product, fair price, and timely delivery, thus Pro-Dec is my go to company.