Abstract: A connector arrangement for butt joining substantially hollow, tubular structural members is provided comprising a connector which is securely fastened within the end of a first member to be abutted to an extending member and whereby the head of the connector protrudes from the first member and is simultaneously and securely retained within two openings provided within the extending member. In a preferred embodiment, the two openings in the extending member extend the full length of the extending member along each side face thereof. In this manner, the joint may be effectuated at any location along the length of the extending member. The head configuration of the connector includes a spherical portion and a plate portion, which provide for a secured fit within the two openings of the extending member.