1°47 Applicable tool for each external thread type Applicable tool for each external thread General purpose General purpose Pipe type Partial-profile Full profile Thread type 60° 55° ISO metric Unified Whitworth Parallel pipethreadTaper pipethread - - M UNC, UNF BSW, BSFUNEFW GBSP, PF R, PT, BSPT Thread form 1/8P 1/8P 60° 55° 60° 60° 55° 55° Tool type 1/4P 1/4P ST type 0.5 ~ 3 mm 0.5 ~ 3 mm 48 ~ 8TPI 48 ~ 8TPI 0.35 ~ 3 mm 32 ~ 8TPI 28 ~ 8TPI 28 ~ 11TPI 5-20 5-7 5-10 5-8 5-11 5-13 5-14 STCR/L-18 0.4 ~ 3 mm64 ~ 8TPI - 0.5 ~ 1.5 mm - - - 5-15 5-4 5-4 JS-STCL18 0.4 ~ 3 mm 64 ~ 8TPI - - - - - 5-17 5-4 JSXXR/L 0.2 ~ 1.5 mm 127 ~ 16TPI - - - - - 5-17 5-5 JS-SXXL09 0.2 ~ 1.5 mm 127 ~ 16TPI - - - - - 5-18 5-5 JST TR/L 0.5 ~ 1 mm 0.5 ~ 1 mm 48 ~ 25TPI 48 ~ 25TPI - - - - 5-19 5-5 5-10 JS-T TL3 0.5 ~ 1 mm 0.5 ~ 1 mm 48 ~ 25TPI 48 ~ 25TPI - - - - 5-19 5-5 5-10 JSXBR/L 0.5 ~ 1 mm 48 ~ 25TPI - - - - - 5-20 5-6 ST type 0.5 ~ 3 mm 0.5 ~ 5 mm 48 ~ 8TPI 48 ~ 8TPI 0.5 ~ 3 mm 32 ~ 8TPI 28 ~ 8TPI 19 ~ 11TPI 5-23 5-7 5-10 5-8 5-11 5-13 5-14 0.5 ~ 1.5 mm 48 ~ 16TPI - - - - - 5-24 5-24 5-2