10 bolt hole quantity inludes two flanges; center hole 9/16-18 unf 2bthd; one plug, hex head 3/8 in.tube size; and one o-ring oxide surface treated round, one bolt hole circle
nst thread class 4 bolt hole quantity 7.500 thread quantity per inch four slots spaced 90.0 deg apart, 0.750 in. w, 1.500 in. deep round, one bolt hole circle