SC-T-Adapter Ultrashort, T-2 (male)/2"SC (female), 10 mm
SC-T-Adapter Ultrashort, T-2(male) / 2"SC(female), 10 mm optical length (component part of #2958500)
When it's out of stock, you might also consider the following alternatives:
Baader Ultra Short SC-T-adapter
Please note, depending on what sort of camera or other accessories you want to attach, you might also need a T-threaded extension tube:
T-2 40mm Extension Tube
Only one item included; image is for demonstration only: shows the thread on both sides.