Clamping nut

Type        Model              B            L                  Clamping Nut
 A              S/ER11         17        110                 ER11-T1    ER11-A
                 S/ER16          25        120                ER16-A     ER16-T1
                 S/ER20          30        130                ER20-A     ER20-T1
UM           S/ER25-S      37         210               ER25-B     ER25-T2
                 S/ER32-S      45         250               ER32-B     ER32-T2
                 S/ER40-S       58        290               ER40-B     ER40-T2
                 S/ER50-S       72        350               ER50-B     ER50-T2
M             S/ER25  168  38-42  ER25-B ER25-T2
                S/ER32  190  250  ER32-B ER32-T2 
                S/ER40  210  55-63  ER40-B ER40-T2 
                S/ER50  240  78-85  ER50-B ER50-T2

                S/ER8M  8  70  ER8-M 
                S/ER11M  11.5  90  ER11-M
                S/ER16M  15  110  ER16-M
                S/ER20M  19.5  120  ER20-M