Buy Heavy Duty Threaded Inserts 

These Heavy Duty Round Threaded Inserts are used to bolt machine feet and tilt glides to hollow furniture legs or machine legs. They can also be used to securely fix casters to furniture legs. The design features an interference fit, also known as a push fit, meaning that the parts are installed quickly by hand. The heavy duty design makes these threaded inserts suitable for bolting machine feet onto high load machines. 

Materials

Nylon With Nickel Plated Brass Or Stainless Steel Inserts