Model Overview & Print Notes

Modular Bolt Knobs – M4 to M12 (DIN931 / DIN933) This set contains parametric-style 3D printable knobs designed to hold standard hex bolts from M4 up to M12, compatible with DIN 931 (partially threaded) and DIN 933 (fully threaded) bolts in any desired length. The bolt is inserted into the knob and secured with a dedicated snap-fit cap. Once clicked into place, the cap prevents the bolt from falling out and keeps it firmly positioned inside the knob. This creates a strong, reliable clamping knob using standard hardware. Features: - Compatible with M4, M5, M6, M8, M10, and M12 bolts - Suitable for DIN 931 and DIN 933 hex bolts - Works with bolts of any length - Secure snap-in cap system - Clean and professional appearance Ideal for machine building, jigs, fixtures, and workshop applications Included in the ZIP file: - 6 STL files for the knobs (M4–M12) - 6 STL files for the matching snap caps ## 3D Printing Settings The models can be 3D printed with any filament (PLA, PETG, ABS, ASA, etc.). For visual accenting, the knob and cap can be printed in different colors. For maximum mechanical strength, printing with 100% infill is recommended.