Fully Parametric Star Bolt Knob for Hex Bolts

Boost Me  Turn standard hex-head bolts into comfortable hand-tightening knobs with this fully parametric 3D-printable design. The model is designed around the bolt itself: the hex head fits securely inside the knob, while the star-shaped outer profile provides a comfortable grip for tightening and loosening by hand. A separate press-fit cap closes the back of the knob for a clean finished appearance. The main advantage of this design is that it is fully parametric. Instead of downloading a different model for every bolt size, simply adjust the parameters to match the bolt you need and generate the appropriate knob. Useful for: workshop jigs and fixtures adjustable furniture and equipment clamps 3D printer projects DIY builds anywhere a bolt needs to be tightened frequently without tools The photos show the same design adapted to different bolt sizes. Features Fully parametric design Designed for standard hex-head bolts Comfortable star-shaped grip Captive hex-head recess prevents the bolt from turning Separate rear cap for a neat finish Easily adaptable to different bolt dimensions Simple, practical print with no complicated assembly A small everyday part, but one you can customise and reuse for countless projects.