Bolt head is flat, circular and 0.293 thick; surface of head has 5 blind holes: diameter 0.188 x 0.293 depth - 4 of the holes are around the outer edge of the bolt head surface measuring from the center of the 5th blind hole located in the center of the head to each of the 4 surrounding blind hole centers is 0.430 ea; at thread end of bolt there is a 30.0 countersunk blind hole in the end of the bolt traveling towards the head end with a diameter of: 0.370 x 0.609 depth; from bottom of head to end of thread end of bolt the length is: 1.050; shank diameter of bolt is: 0.554