Shoulder nut eye bolts are not quite as common as regular nut eye bolts. Their shoulder makes them ideal, however, for flush mount applications. These shoulder eye bolts are made from forged stainless steel, Type 316. And like most of Chicago's products, they are made here in the U.S.A. in Chicago, IL. Their Working Load Limit is based on a safety factor of 5:1 for straight, in-line loading. Angular loading should be avoided as it reduces the Working Load Limit.