Special Features:

Ygcentering block has a 9.6 inch od, a 6.6 inch id, and thickness of 2.0 inch has three .375-16 unc bolts are captive within ring fastening it to the counter-torque tube of the 3c4078 wrench. The ring is made of a laminated phenolic.

Properties:

A fixture designed to hold/position aircraft components to facilitate inspection, repair, testing and/or replacement of components. D0 not use if a more specific name applies. See fixture (1) (as modified).