referring to fig1 b slot 1007 allows horizontal movement of sliding insert member 301 b about a post inserted through hole 1006 in interlock housing member 304 b while limiting the vertical movement of sliding insert member 301 the mounting screw access hole 607 of sliding insert member 301 is shown positioned over the mounting screw hole 506 of interlock housing member 304 b referring again to fig1 a post 1005 is shown positioned through the top and bottom surfaces of interlock housing member 304 b passing through slot 1007 of the sliding insert member as shown in fig1 b post 1005 may be a rivet a bolt and nut assembly or a post affixed within interlock housing member 304 b at its first and or second ends using a variety of techniques such as welding soldering adhesives press fit and so forth as are well known to one of ordinary skill in the art in alternative embodiments the housing member 304 b is simply closed at its bottom end to prevent the sliding insert member 301 b from sliding vertically downward during operation fig1 a is a cross sectional drawing illustrating the embodiment of fig1 a with additional components and installed on a sliding panel 106 b gaskets 802 a and 802 b are friction bearing and shock absorbing members as described in connection with the above embodiments shock absorbing member 801 is configured to contact the engagement lip of an interlock assembly on an adjacent sliding panel as described above in.