Internal thread size: M5 Ring inner diameter: 13.5 mm / 0.53 " ; Overall Height: 23.4mm / 0.93" Made of 304 stainless steel, rustproof, corrosion resistant and durable Designed to be screwed into various lengths of threaded rod or stud Securing or lifting objects Widely used in many marine and industrial applications and generally used to connect cables or ropes to objects