New Old Stock joystick shaft and red knob for Stargate (and possibly Defender #20-9260?, part of upright assembly 20-9254?) upright (and possibly cocktail) games.
Ball: 1.225 in dia.
Shaft: 5/16", then 1/4", shaft total length 2-1/16", total length of joystick and knob is 3-5/16" (inches)
A few used ones available for 1/2 price.
Please note: Joysticks were manufactured on an industrial scale and may contain small imperfections.