PART NO. THREAD DIMENSIONS E F A B S1 7B4-02PK G1/8"X28 G1/8"X28 18.5 18.5 16 7B4-04PK G1/4"X19 G1/4"X19 20 20 19 7B4-06PK G3/8"X19 G3/8"X19 25 25 24 7B4-08PK G1/2"X14 G1/2"X14 27.5 27.5 27 7B4-12PK G3/4"X14 G3/4"X14 31.5 31.5 33 7B4-16PK G1"X11 G1"X11 37.5 37.5 41 7B4-20PK G1.1/4"X11 G1.1/4"X11 48 48 50 7B4-24PK G1.1/2"X11 G1.1/2"X11 53 53 60 7B4-32PK G2"X11 G2"X11 62 62 70