Slip joint connector

A slip joint connector for joining first and second structural elements together, said connector having first and second cylindrical body members, thread means for fastening said first body member to said first structural element and thread means for fastening said second body member to said second structural element, a protuberance projecting from said first body member in a direction remote from said first structural element, said protuberance having an external configuration including first and second portions each having a different geometric configuration, said first portion having a truncated conical configuration including an axis of elongation spaced from said first body member and said second portion having a plurality of planar walls extending intermediate said first portion and said first body member, a receptacle formed in said second body member opening onto a surface remote from said second structural element, said receptacle having internal walls of a configuration conforming in size and shape to said first and second portions for receiving said protuberance in only one disposition through said surface, and locking means for securing said protuberance within said receptacle, said locking means comprising a bore extending through said first portion of said protuberance, said bore having an enlarged cavity opening onto one end of said bore, nut means disposed within said cavity, means for securing said nut within said cavity, and bolt means extending through said second body member into said receptacle and threadedly receivable within said nut means when said protuberance is within said receptacle for drawing said protuberance tightly into abutment with said internal walls of said receptacle.