Thumb screw knob for M3 socket head cap screw - ribbed knob, 4 sizes 16/20/25/30 mm, no supports

Fourteen deep flutes. Grips with oily or gloved fingers, which is why it belongs on machines rather than on a desk. Takes the head of an ISO 4762 (DIN 912) socket head cap screw M3 from the back. A hex boss in the pocket floor engages the screw's socket, so the knob turns the screw instead of slipping round it. The shank points out of the back, the front stays closed. M3 is the printer-bed levelling screw - the most common reason anyone prints a thumb screw. ## Sizes in the download All 4 diame…

♥ 0