Hand Tap Set Bottoming Plug Taper HSS Size 7/8 Finish Bright Flutes 4 General Purpose Pitch 9 Thread Type UNC Thread Length 2-7/32 In. Thread Length 56.358 mm Overall Length 4-11/16 In. Overall Length 119.063 mm Pitch Diameter Limits H4 Shank Dia 0.697 Standards USCTI 302 List Number 1004 For Alloy Steel Carbon Steel Free-Machining Stainless and Aluminum