PART NO. THREAD DIMENSIONS E F A B S1 7N4-02 Z1/8"X27 Z1/8"X27 18.5 18.5 16 7N4-04 Z1/4"X18 Z1/4"X18 20 20 19 7N4-06 Z3/8"X18 Z3/8"X18 25 25 24 7N4-08 Z1/2"X14 Z1/2"X14 27.5 27.5 27 7N4-12 Z3/4"X14 Z3/4"X14 31.5 31.5 33 7N4-16 Z1"X11.5 Z1"X11.5 37.5 37.5 41