Connect two differently sized male-threaded parts, such as threaded rods, and tighten with a standard wrench. The threads on these adapters have various sizes and spacing, so you can increase or decrease thread size or adapt from coarse to fine threading. You can also use them to change the gender of a connection from male to female. Small adapters can work as threaded standoffs, which position and separate circuit boards and other components in assemblies.

Unlike most bushings, these won’t buckle the material or distort the hole when installed in thin-gauge aluminum and steel fixture plates. They’re held in place by a lock ring (sold separately), so they’re easy to remove and reuse. Also known as jig bushings, they accurately guide drill bits, counterbores, reamers, and other cutting tools. Use them to make sure your drilled holes and cuts are consistent from part to part.