Threading Inserts WHITWORTH BSW, BSF, BSP INTERNAL B.S.84: 1956ISO 228-1: 1994 B A W NUT R 0.137P 55° L R 0.137P W SCREW I.C. PITCH CATALOG NUMBER DIMENSIONS TPI RIGHT HAND LEFT HAND Lmm I.C. A B 72 W72 IR16 W72 IL16 0.7 0.4 60 W60 IR16 W60 IL16 0.7 0.4 56 W56 IR16 W56 IL16 0.7 0.4 48 W48 IR16 W48 IL16 0.6 0.6 40 W 40 IR16 W 40 IL16 0.6 0.6 36 W36 IR16 W36 IL16 0.6 0.6 32 W 32 IR16 W 32 IL16 0.6 0.6 28 W 28 IR16 W 28 IL16 0.6 0.7 26 W 26 IR16 W 26 IL16 0.7 0.8 24 W 24 IR16 W 24 IL16 0.7 0.8 22 W 22 IR16 W 22 IL16 16 9.525 0.8 0.9 20 W 20 IR16 W 20 IL16 0.8 1.0 19 W 19 IR16 W 19 IL16 0.8 1.0 18 W 18 IR16 W 18 IL16 0.8 1.0 16 W 16 IR16 W 16 IL16 0.9 1.1 14 W 14 IR16 W 14 IL16 1.0 1.2 12 W 12 IR16 W 12 IL16 1.1 1.4 11 W 11 IR16 W 11 IL16 1.1 1.5 10 W 10 IR16 W 10 IL16 1.1 1.5 9 W 9 IR16 W 9 IL16 1.2 1.7 8 W 8 IR16 W 8 IL16 1.2 1.5 23