127mm f/9.4 Cradle Rings Construction - Cradle Rings - Knurled Knobs - Bottom
 

Bottom-view of one of the Knurl Knob used to lock the telescope into the Cradle Rings... (Click for enlarged view)

 
A view of the bottom end of the stainless steel knurled knobs. This end is tapped to receive a 1/4"-20 size threaded rod. The knob is 1"L x 1"W in size.