Here you'll find superior grade type 316 stainless steel hex head bolts. Diameter sizes range from 1/4" up through 1". Bigger and smaller sizes are available by request. Length is measured from underneath the head. Longer bolts won't be fully threaded. Type 316 stainless steel resists rust and corrosion even in harsh environments. (Highly recommended for chemical, salt water or coastal areas) Please select from the category sizes below.