Cart 0 $0.00



In stock

  • Quickly and easily restores inch, metric, pipe, male and female threads
  • Great for home projects, industrial, automotive, farm & ranch, and technicians
  • 40mm dia. head x 8mm inside hole; Fits in a die grinder or standard drill (using RTM5 sold separately))
  • Used for reaching further down threaded rods; larger circumference provides longer tool life
  • This patented and award winning tool fixes inside or outside threads no matter the size, length, pitch or diameter
  • For bulk orders, please contact us
  • Product Specification Sheet
SKU: RT4-LP02 Category:

Frequently Bought Together


Avoid regularly spending on expensive replacement parts or repairs and solve your loose thread problems in just seconds with the RT4 Rotary Thread file! The RT4 Rotary Thread file is the only universal thread file that you’ll need to restore any threaded material!

Designed for both industry and home use, the RT4 boasts a user-friendly design that enables all types of users to restore damaged Inch, Metric, Pipe, Male, and Female Threads made out of Metals, Hardened Metals, Ceramics, Glass, and Plastics in just under a minute!

What is the RT4 Rotary Thread File Used For?

The RT4 Rotary Thread file is the ideal tool for restoring threaded parts whether you’re a beginner home improvement enthusiast mechanic, or professional in the industry.

You can use the RT4 Rotary Thread file for restoring loose inner and outer threads because of its universal design.

No more need for bulky tap and die kits with plenty of parts. The RT4 Rotary Thread can be attached to a die grinder tool and can be instantly used to perform restoration jobs in in-home projects, automotive, farm & ranch, and industrial settings.

You no longer need to practice using it before getting perfectly restored threads. The Universal Design of the RT4 makes it a plug-and-play tool that you can use right out of the box.
Simply attach the RT4 to your die grinder and start restoring threads by guiding the RT4 Rotary Thread file along the old threads as you work your way towards the damaged threads. You’ll get instant results in just a few seconds!

Fix Any Threaded Tool or Material!

The RT4 Rotary Thread File is made with high-quality steel to help you restore threads made with materials including Metals, Hardened Metals, Ceramics, Glass, and Plastics.

Professionals love using the RT4 because of its versatile design that gives them flexibility on thread restoration jobs. The unique 60-degree “V” angle that comes with all Rotary Thread products sheds hours off the restoration process, making it possible to restore threads back to their perfect condition in well under a minute.

The ingenious 6-degree “V” angle design completely eliminates the need for measuring the pitch and diameter of the threads you want to restore. The universal design makes the thread file an instant fit for all types of threads including Inch, Pipe, Metric, Male, and Female.

Quick Storage & Easy Maintenance

The RT4 Rotary Thread file comes in a compact size that makes it easy to store and maintain. You can fit this into any toolbox or drawer without having it take too much space.
All Rotary Thread files are made with high-quality durable steel that is very low maintenance. For best performance and added lifespan, we recommend using tapping oil along with adding light pressure to the tool when used.

It is also recommended to clean the tool with a non-flammable paint thinner after every use for proper storage.

Available Replacement Parts

All Rotary Thread tools are available online. We offer files, grooves, glands, mandrels, and collets by the piece on our website.

Additional information

Weight 0.5 lbs
Dimensions 7.63 × 3.69 × 0.75 in
Average Rating


( 4 Reviews )
5 Star
4 Star
3 Star
2 Star
1 Star

Only logged in customers who have purchased this product may leave a review.

4 Reviews For This Product

  1. 04

    by Joseph G.

    Great tools. Turned a chore into a not so bad after all.

  2. 04

    by Mark Uhlman

    Have couple of these they are good but last one came with no wheel. Need better packaging

  3. 04

    by Patrick

    I used this to grind the threads on a bolt that was damaged on my fwd drive shaft. Attached this to my rotary tool that I also purchased from Amazon and this did the trick. Just make sure to use cutting oil and keep it lubed while in use.

  4. 04

    by Travis C.

    Don’t mistake this for the B218, I was looking for the buttress thread version. I have not tried it out.I have used it now a couple times, it works, but I find it is more controlable at at drill speeds than die grinder speeds.

Main Menu

Restore any damaged thread!
get 15% OFF!
rotary thread kits today!
Use code: ROTARY15

Hurry! Limited Time Slot!

My cart
Your cart is empty.

Looks like you haven't made a choice yet.