These machined steel collars provide a convenient and robust method for joining tube and bar stock with English O.D.’s. 3/4, 1, 1 1/4, 1 1/2, 1 3/4. Any combination of sizes is permitted at any angle. Tubing may be of any suitable material with a size compliant O.D.

The construction roll pins may be used to secure the collars to each other or to custom plates and components for consistent and accurate welding.