1/4 20 bolt in 13, 26, 39, 52 mm

Please do not use these in any place where safety is a concern. 1/4 20 bolt in 13, 26, 39, 52 mm. I printed these in ABS, 0.4 nozzle, 0.2mm layer, 100% infill in a 5 years old BIBO printer and they are useable. Nut and bolt have a tight fit.