Geoffs Wood screw Nut

thingiverse

Needed to hold a shelf on really securely but I didn't have any long metal thread screws - but I did have hundreds of long woodscrews - so my woodscrew nut was born :-) Just drill a clearance hole thru the shelf, and use a shifter, multigrips or whatever to tighten the nut. I found these nuts to be necessary, as nearly any length screw (within 25mm) can be used. Sadly, using the screw point up doesn't work in most cases - as the EXACT length screw is needed - a length error of as little as 5mm doesn't work, either the screw strips when tightened OR the screw tip pops out through shelf's top. I have even had screws apparently screwed in OK, but when a BIG force was applied to the shelf - the screw stripped and fell out - dropping my spare Myriwell 3D printer 1.8m to the ground - not good IMHO. My woodscrew Nut also works with VERY THIN shelves (12mm or less) - which is plain impossible with a point up wood screw