Industrial lifting eye nut, precision cast grade 316 stainless steel for superior rust resistance * 5/16 in. UNC thread size, 1/2 thread depth, 1/4 shank diameter; electronic polished * 3/4 eye inside diameter, 1-1/4 in. eye outside diameter; height overall 1-1/2, weight 0.9 oz * Tall-collar design allows greater thread depth for increased lifting capacity * Working load limit 800 lbs. Numerous other styles/sizes (including metric) also available