Anti-torque Features for External Fixation Frame Components

A method of assembling an external fixation system, the method comprising:

• coupling a first fixation ring to a second fixation ring via a plurality of struts, the first fixation ring having a first plurality of holes extending therethrough and the second fixation ring having a second plurality of holes extending therethrough;
• positioning a base of a post on a top surface of the first fixation ring so that an opening in the base of the post aligns with one of the first plurality of holes;
• passing a threaded bolt through the one of the first plurality of holes from a bottom surface of the first fixation ring toward the top surface of the first fixation ring until the threaded bolt is at least partially received within the opening in the base of the post;
• and
• rotating the threaded bolt to engage threads of the threaded bolt with complementary threads of a threaded hole of the post extending from the opening in the base of the post in a direction toward a free end of the wire post to secure the post to the first fixation ring,
• wherein during the rotating, a first protrusion extending from the base in a direction opposite the free end contacts with the top surface of the first fixation ring, and the rotating is continued until the first protrusion penetrates the top surface of the first fixation ring.