OTCs Internal Threaded Adapters feature high strength metal construction, precision threads, and a corrosion resistant coating. Attaches to ends of Push-Puller legs or forcing screws to aid in the installation of shafts, axles, housings, and more. Internal end A threads - 5/8-18. Internal end B threads - 1-1/8-12. Value is at the core of the OTC tool and equipment portfolio. Whether it’s a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it’s a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians’ productivity and shop profits.