Default sorting Sort by popularity Sort by latest Sort by price: low to high Sort by price: high to low View: 24 48 All Aero Finish Washer $4.50 6061-T6 aluminum. Countersunk hole allows a smooth, aerodynamic finish. Available for #10 or 1/4″ flat head bolts.Select options This product has multiple variants. The options may be chosen on the product page