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A potentiometer knob with a set screw for locking it in place.
A potentiometer knob with a set screw for locking it in place.
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An assortment of screws, and a US quarter for size comparison
An assortment of screws, and a US quarter for size comparison
A Brown & Sharpe single-spindle screw machine
A Brown & Sharpe single-spindle screw machine
A machine screw
A machine screw
Lag screw, also called a lag bolt
Lag screw, also called a lag bolt