Twist Knob

thingiverse

Replacement test knobs for lamp switches, also known as knurled lamp keys, are available in sets of three. Two of these knobs feature pre-threaded 4-40 UNC designs, while the third sports a distinctive 6-32 thread pattern. For optimal results when printing these custom parts, it is highly recommended to use a layer height of between 100-120 microns, as this will ensure that the threads are accurately rendered during the printing process.