PART NO. THREAD DIMENSIONS E,F,G A B C S1 GN-02PK Z1/8"X27 20 20 20 16 GN-04PK Z1/4"X18 22.5 22.5 22.5 19 GN-06PK Z3/8"X18 26 26 26 24 GN-08PK Z1/2"X14 31 31 31 27 GN-12PK Z3/4"X14 34 34 34 33 GN-16PK Z1"X11.5 42 42 42 41 GN-20PK Z1.1/4"X11.5 48 48 48 50 GN-24PK Z1.1/2"X11.5 53 53 53 60 GN-32PK Z2"X11.5 62 62 62 70