Material: Low carbon steel ASTM A29/A108 Grades 1010-1020 Length: Length is before weld. Stud diameters ½” and below will be approximately 1/8” shorter after welding. 5/8” to ¾” diameters will be approximately 3/16” shorter after welding. Thread: Standard UNC2A Ferrules: Includes required flat ceramic ferrules (insulators) (Other types of