The Helical Brass Inserts are compact inserts suitable for insertion in all types of plastics and can Helical Brass Inserts be used with hot plastic. They are created precisely according to the clients specifications and outline. The helical inserts are coiled wire inserts that are used to repair stripped threading and reinforce bolted connections. The coils are wider than the tapped hole. Helical Brass Inserts are specially designed to cut their own threads as they are being driven into a drilled hole.