Matl steel corrosion resistant type 302 or 304, surface treatment passivated mil-std 171 finish no 5.4.1, 0.885 kn. Min to 0.890 in. Max o/d, 0.829in. Min to 0.831 in. Max i/d, 0.105 i n. Min to 0.115 in. Max thk, 0.070 in. Min to 0.080 in. Max depth, 0.031 in. Min to 0.036 in. Max fillet radius, one 0.312 in. Diameter centrally located hole, three 0.092 to 0.098 in. Diameter holes located 120 degrees apart on 0.6562 in.Dia hole circle