Review on HHIP 7/16"3/8-16 T-Slot Nut (3900-1202) - Secure and Versatile T-Slot Fastener by Eric Stewart

Check table dimensions when ordering. If you order the right size, they will fit. The threaded hole is not drilled very precisely, but works great. The thread is not closed. This is an incomplete thread on the bottom to protect your T-slot. If you're using it for a drill press or other open-bottom T-slot, you'll need to run the tap to cut the threads. The main dimensions (T-slot) are straight, smooth and precise. They are best suited for metalworking tools. The black oxide surface needs to be lubricated and protected. If you have woodworking equipment where your table is usually dry, you need a little extra attention to avoid corrosion.