AC-TK28
Ultralight AC-TK28 fine thread black knob. The AC-TK28 clamp knob is an original design for the Ultralight AC-CSF28 clamps. They are more stylish then the Ultralight AC-TK and have a fine thread. They are black and have a 1/4"-28 fine thread. Made out of 6061 T6 aircraft-grade aluminum with Type III anodizing . Will work in the harshest of environments, time proven and built to last.