Screw-On Knob, M6 X 0.25P Thd, Stainless Steel, for Fine-Pitch Adjustment Screws, 12mm Dia. (10-Pack)

FPSAN Screw-on Knobs should be used when frequent adjustment of the screw is required. For installation, the knob is simply screwed on to the end of the adjustment screw, however, the knob must be selected so that its thread matches the thread of the adjustment screw. The knobs can be removed when they are not required, which improves the operability and efficiency of manual stages and maintenance work. Each knob has an access hole in the back to allow an allen wrench to engage the hex key of the adjustment screw. This is also needed when tightening the knob to the adjsutment screw. These knobs have a straight knurl to provide slip-free rotation.