Timesert thread repair inserts are the best system we have seen for repair or strengthening damaged or even new threads as part of the manufacturing process. Available in thin and thick wall [Bigsert] configurations in most popular thread sizes. http://www.timesert.com/


TIME-SERT® FOR PERFECT REPAIR OF DAMAGED OR STRIPPED THREADS.

The Timesert system is based on solid thin wall inserts – able to withstand high stress and vibration, as well as frequent screw tightening cycles.

Advantages include:

TIME-SERT® is very thin due to synchronized internal and external threads. This thin cross section allows for installation in areas of limited space and clearance.
TIME-SERT® is pressure sealed upon installation.  Liquids & compressed gases will not flow around the insert.
TIME-SERT® is self-positioning. Having a flange it cannot wind down into the newly repaired hole.
TIME-SERT® is self locking. On installation the bushing will not come out with screw / bolt.
Certain sizes are available in Stainless Steel – suitable for corrosive or food equipment.

Applications: include Stud bolt threads, High load bearing applications, head bolts, diff stud bolts, spark-plug threads.

Materials: Timeserts can be used in Aluminum, Cast iron, Steel, Brass.

---

Walton Tools make very handy tap extensions and a wonderful broken tap extractor – which enables removal of fractured taps in most situations. Available in a huge variety of sizes / flute types. [Just magic!] We are the Sole Thai distributor and stock most of these products. http://www.waltontools.com/ 

Thoroughly remove all chips of the broken tap. Insert the Extractor fingers into the flutes of the broken tap, pushing them gently, but firmly, into position.	Push the holder down until it touches the broken tap. Slide the sleeve down until it touches the work.	Apply a tap wrench to the square end of the holder. Twist forward and backward a few times to loosen, then back out the broken tap.