Cre steel bar; passivate; 2 tiered with common center; upper tier 0.600in. Dia, 0.063 in. H; lower tier has one str side 0.345 in. From center, ends of side connected by arc with radius of 0.875 in., arc portion has 0.031 x45 degrees chamfer; 3 holes in lower tier 0.147 in. Diameter thru, countersunk 82 degrees to 0.281 in. Dia