Bordo PowerCoil Thread Repair Kits. Photo of an M6 Kit is just to show the Kits appearance.
UNF = Unified National Fine. Sizes #4-48 through to 1/2 are supplied with the full Kit as pictured. Including HSS Tap, Drill, Inserting Tool, punch & 1.5D 304 Stainless Steel Inserts. Kit Sizes 9/16 and Above are supplied with the following.HSS Tap, Inserting Tool & 1.5D 304 Stainless Steel Inserts. (20pcs inserts 4-48 to 5/16" kits, 15pcs 3/8" kit, 10pcs included with 7/16 to 5/8" kits, 5pcs inserts 3/4" to 1" kits & 3pcs inserts 1-1/8" and above). PowerCoil Wire Thread Inserts strengthen tapped threads in light weight parent materials such as aluminium. They are helically wound inserts made from high quality chromium nickel stainless steel with a diamond shaped cross section. PowerCoil inserts are used in OEM applications in a wide range of industry sectors including aerospace, automotive, military and electronics. They are inexpensive when compared to other inserts and simple to install, yet are extremely tough, wear resistant and corrosion resistant. Most importantly, PowerCoil inserts allow the stress loading from the bolt or similar threaded part to be more evenly distributed over the threads in the parent material.
Manufactured from high quality chromium nickel stainless steel, PowerCoil Wire Thread Inserts provide high strength internal threads that resist the effects of temperature and corrosion. Their unique design ensures superior threads whose compound performance cannot be reproduced by any other single fastening method. Available in two basic forms, free running or screw locking, they are much lighter and less expensive than any other equivalent type of thread insert and because of their compact size they can generally be incorporated into existing designs where no previous provision has been made. FREE RUNNING INSERT KIT = Produced from precision profiled austenitic stainless steel wire wound into a helical spiral, PowerCoil free running inserts have a spring like appearance.
When installed, using any one of a variety of manual or automatic tools, they provide strong permanent internal threads which resist heat and corrosion. Once fitted, their position is maintained by the action of radial pressure between their coils and the flanks of the tapped hole.
This pressure exists because their free diameter is larger by a calculated amount, than their installed diameter.