To quickly and easily provide a threaded socket for a wooden workpiece (especially within a blind hole), insert the fastener, such as a bolt, into an insert nut. Then screw both nut and fastener into a pre drilled hole in your wooden workpiece. Other types of insert nuts for other purposes include well nuts, which have a rubber sleeve that seals against moisture, and insulates against vibration and conductivity. Jack nuts are insert nuts that are well suited to fastening thinner workpiece material, or materials that are more brittle. Items may vary by material, finish, head diameter, thread size and other considerations. For more, see our selection of thread inserts and rivet nuts.