Keystone Electronics Corp. Single Bar Instrumentation Knob, Black 8573

The 8573 is a single bar instrumentation knob with a black colored polypropylene hub and a soft-touch thermoplastic elastomer gripping surface, supplied with a brass, nickel-plated insert and two set screws for shaft attachment. The shaft diameter is 0.250 inches (6.4 mm), the knob height is 0.610 inches (15.5 mm), the inner diameter is 0.550 inches (14.0 mm), the nut clearance diameter is 0.430 inches (10.9 mm), and the counterbore depth is 0.090 inches (2.3 mm).