Material: 302/304 Stainless Steel 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 full/flat ceramic ferrules (insulators) Flux: Solid Fluxed