Self-Locking Insert Kit System of Measurement Inch Insert Diameter Not Applicable Internal Thread Size #10-24 1/2 In.-13 1/4 In.-20 3/8 In.-16 5/16 In.-18 Thread Direction Right Hand Thread Type Coarse Overall Length 13/32 in 7/16 in 31/64 in 33/64 in 21/32 in Number of Pieces 46 Number of Sizes 5 Material Stainless Steel Material Grade/Class 18-8 Finish Plain Wall Type Heavy Wall Compatible Material Metal Manufacturer Location Made in USA Drive Type Slotted