0.260" hole diameter 0.454" outside diameter 0.075" material thickness spherical radius 0.290 in. min 0.310 in. ma, countersink dia 0.332 in. min 0.342 in. max, countersink depth 0.025 in., recess angle 89 deg min 91 deg max cadmium surface treated convex
3b thread class right-hand 28 thread quantity per inch 1.200 min depth of full thread; 0.295 dia by 115 degrees min, 125 degrees max countersunk passivate surface treated