Sea-Dog Stainless Eye Nuts 078106-078110 have NC threads. These threaded Eye Nuts are designed to be screwed onto various lengths of threaded stock or bolts to accommodate varying transom thickness. Metric Eye Nuts 078206-078212 can be used with Sea-Dog eyebolts 080363-080399, 080463-080506 and 080606-080610. Investment cast 316 stainless.NOTE: See chart for additional information.