79317 Adapter Size: #1 (0.747) Tap Size Range: #0 to 9/16″ HAND Tap Size: 3-8 Tap Shank Dia.: 0.381 in Tap Shank Square: 0.286 in Proj.: 0.98 in Tap Enters: 1.05 in Permissible Torque: 10.8 ft–LBS Body Dia.: 1.26 in A- Proj. B- Body Dia. C- Tap Enters D- Tap Size