Helical Inserts are precision formed screw thread coils of stainless steel. Helical inserts have a diamond shaped cross section. Helical inserts provide permanent conventional 60degrees internal screw threads that accommodate any standard bolt or screw.FeaturesType - Screw Locking.Material - 304 Stainless Steel.Internal Thread Size - 1 x 8.Thread Type - UNC.Thread Direction - Right Hand.Length - 1.5 in.Free Coil Size - 1.169-1.199 in. Dia.Drill Size - 1.03125 in.Tensile Strength - 200,000 PSI.Rockwell Hardness - C43-C50.Application - For Metal.Package Quantity - 1.Body Style - Helical.Exterior Finish - Plain.