Threading Inserts WHITWORTH BSW, BSF, BSP INTERNAL B.S.84: 1956 B ISO 228-1: 1994 B A A W NUT R 0.137P 55° L L R 0.137P W SCREW I.C. I.C. MULTITOOTH STANDARD STANDARD PITCH CATALOG NUMBER DIMENSIONS TPI RIGHT HAND LEFT HAND Lmm I.C. A B 7 W 7 IR22 W 7 IL22 1.6 2.3 6 W 6 IR22 W 6 IL22 22 12.70 1.6 2.3 5 W 5 IR22 W 5 IL22 1.7 2.4 4.5 W 4.5 IR27 W 4.5 IL27 1.7 2.5 27 15.875 4 W 4 IR27 W 4 IL 27 1.9 2.8 MULTITOOTH PITCH TEETHTPI CATALOG NUMBERRIGHTHAND DIMENSIONSANVILLmmI.C.A B 14 2 W14 2M IR16 IS16M 16 9.525 1.8 2.8 14 3 W14 3M IR22 2.8 4.6 IS22M 22 12.70 11 2 W11 2M IR22 2.4 3.5 24