Along with the pitch, or number of threads per unit length, thread friction contributes to the self-locking, or “non-overhauling” property of most screw threads. Self-locking threads easily ...

A non-permanent fastener, such as a screw or bolt, is designed for reusability ... threads and permanent fasteners are typically non-threaded, there are notable exceptions. Opting for standard ...

But [Sanford Prime] has a different approach: he prints his hardware, at least for non-critical ... stronger the screws tended to be. The failures were almost universally in the threaded part ...