AT Screw / Thread Inserts & Kits

Alfa Tools thread inserts and repair kits offer permanent solutions for restoring stripped, damaged, or worn threads in aluminum, magnesium, cast iron, and other soft metals. Whether you’re fixing stripped spark plug threads, reinforcing aluminum manifolds, or repairing damaged fastener holes, our comprehensive selection includes helical coil (wire thread) inserts, solid screw inserts, NPT pipe thread inserts, and complete repair kits with installation tools. These thread inserts create threads stronger than the original material, prevent future thread damage, and enable the use of standard fasteners in soft metals without the risk of stripping.