A securing pin for securing two structural members that can be used in the assembly of modular furniture. In one embodiment, the securing pin includes a main cylindrical body having an elongated countersink portion positioned at a first end of the main cylindrical body of the securing pin. The first end of the securing pin configured to be secured to a first structural member and a second end of the securing pin configured to be secured to a second structural member. In one embodiment, the second end of the securing pin is secured to the second structural member by a press-fit attachment with a securing split-ring. A fastening device inserted within the elongated countersink portion of the securing pin to secure, and firmly abut, the first structural member to the second structural member.