Seal lock and the like incorporating permanently secured single engagement

In a seal lock and the like of the type having an end portion of a bolt received engaged axially into a bolt opening of a body for permanent securement therein by a resiliently urged securement member mounted within said body constantly urged from an effective non-interference position into an interference position projecting partially generally transversely into said bolt opening and said bolt end portion;

• the improvement comprising:
• a separate selectively axially movable blocking member in said body bolt opening normally transversely aligned abutting said securement member retaining and constituting the sole means retaining said securement member in its effective non-interference position prior to said bolt end portion being axially inserted into said body bolt opening;
• axial insertion of said bolt end portion into said body bolt opening axially engaging said bolt end portion with and slidably axially inwardly displacing said blocking member from said securement member abutment and shifting generally transverse engagement of said securement member to said bolt end portion;
• surface means partially on said bolt end portion and partially on said securement member ultimately interengaging following the initial of said generally transverse engagement of said securement member with said bolt end portion and continued axial movement of said bolt end portion ultimately permitting automatic transverse movement of said securement member to its interference position positively preventing subsequent withdrawal of said bolt end portion from said body bolt opening.