일반탭(INCH) HTIC unit (mm) CODE NO. THREADS Thread Length Overall Length Shank Dia Length of Square Square L2 L Φd L3 L4 HTIC 14020 1/4-20 UNC 18 62 6.0 7 4.5 HTIF 14028 1/4-28 UNF 18 62 6.0 7 4.5 HTIC 51618 5/16-18 UNC 22 70 6.1 8 5.0 HTIF 61624 5/16-24 UNF 22 70 6.1 8 5.0 HTIC 38016 3/8-16 UNC 24 75 7.0 8 5.5 HTIF 38024 3/8-24 UNF 24 75 7.0 8 5.5 HTIC 71614 7/16-14 UNC 26 80 8.0 9 6.0 HTIF 71620 7/16-20 UNF 26 80 8.0 9 6.0 HTIC 12013 1/2-13 UNC 28 88 9.0 10 7.0 HTIF 12020 1/2-20 UNF 28 88 9.0 10 7.0 HTIC 91612 9/16-12 UNC 28 88 10.5 11 8.0 HTIF 91618 9/16-18 UNF 28 88 10.5 11 8.0 HTIC 58011 5/8-11 UNC 28 95 12.0 12 9.0 HTIF 58018 5/8-18 UNF 28 95 12.0 12 9.0 HTIC 34010 3/4-10 UNC 32 105 14.0 14 11.0 HTIF 34016 3/4-16 UNF 32 105 14.0 14 11.0 CUTTING DATA – TAP Material Cast iron FC Strong cast iron FCD East · Bronze CU · PB Aluminum AL HAND SPIRAL PT.PF HAND SPIRAL PT.PF HAND SPIRAL PT.PF HAND SPIRAL PT.PF SPEED (m/min) 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20 10 ~ 20