Dear Tom and Ray: I have a 2004 Chevrolet Suburban with a six-liter, V-8 engine. It blew out the No. 5 spark plug. I took the car to a Chevy dealer, who put in a Heli-Coil as a repair. Within 1,000 ...

Thor International Company are specialists in fastening solutions, with more than 25 years of experience in screw thread insert systems. We are the main authorised distributor of the Helicoil screw ...