NOMINAL1/4"5/16"3/8"7/16"1/2"9/16"5/8"3/4"7/8"1" A (mm)7,08,910,011,613,615,517,020,624,027,0 B (mm)22,323,628,431,934,537,644,550,857,063,0 H (mm)2,52,52,52,52,52,52,52,52,52,5