1/2-13x1-1/4" 3DP Bolt and Nut set

thingiverse

I've created a practical hardware set with 3D printable screw threads that can be used in various applications. The particular size I chose is ideal for making a good 1/4 bit driver mandrel, and the core hex provides extra strength to this design. This set consists of an imperial 1/2" x 13 TPI by 1-1/4 inch long bolt and nut that mate perfectly with each other. The design ensures that no part overhangs more than 45 degrees, providing a secure fit. Please remember that this is made from plastic and doesn't have the same strength as real nuts and bolts. To add extra support, you can run a 1/4" bolt through the middle and cap it with washers and a nut. I've recently updated the set by adding fender washers that can be used for bearing flanges or other applications. The larger washer measures 25mm in diameter, while the smaller one is 20mm, making them versatile and convenient to use.