SF Industrial Grade 316 Stainless Steel Screw Pin Shackle - Choose Size 3/16", 1/4", 5/16" or 3/8" - Superior Strength and Rust Resistance Premium quality stainless steel hardware suitable for marine & other harsh conditions. Sold individually - order one or more sizes in any quantity Grade 316 stainless steel has superior corrosion resistance and strength over grade 304 Choose size (leg diameter) from 3/16", 1/4", 5/16" or 3/8" - see description for specifications Threaded shackle pin with key hole for tightening/loosening and wiring pin to shackle to prevent lost pins Electronic polishing has bright finish without thread-strength degradation of mirror finish process