Through bolt connection for unilaterally accessible locations

A connecting device for use in joining parts having aligned passage bores of a predetermined diameter, comprising:

• a screw bolt member having a head portion provided at one end of a shank portion of lesser diameter, the other end of said shank portion member being threaded, the center axis of said head portion being transversely disposed relative to the center axis of said shank portion by an eccentricity distance, the maximum cross sectional dimension of said head portion being less than the inner diameter of said passage bores;
• a passage sleeve member having an outer diameter not greater than said head portion diameter and having an eccentric bore therethrough for receipt of said shank portion, said eccentric bore having its center axis transversely disposed relative to the center axis of said passage sleeve member by a distance substantially equal to said eccentricity distance, said passage sleeve member further including a transverse groove provided at one end adjacent said eccentric bore, and said screw bolt member further includes a catch adapted to fit into said groove when said head portion and said passage sleeve member are concentrically aligned;
• and,
• a threaded locking member removably installed on said threaded end of said shank portion, said threaded locking member being tightenable on said shank portion to draw said parts and said head portion into tight locking relationship to each other.