The 5220E is an instrument control knob designed for reliable manual adjustment of electronic components. Constructed from durable phenolic material, it offers excellent heat and impact resistance. This knob has a major diameter of 1 3/4 inches, a height of 1 15/32 inches, and fastens to a shaft using an M4 x 0.7 set screw into a brass bushing. The silver disc lined (SDL) finish provides a clear visual indicator, making it ideal for applications in instrumentation, control panels, and audio equipment where durability and a distinct appearance are valued.