American Mining Macaroni Tubing - Thread Plug and Ring Gages

Helpful Tips

  • Before using the gages, make sure they are clean and free of any dirt, rust, or damage. Use a soft cloth or brush to wipe off any debris. Do not use any abrasive materials or solvents that could damage the gage surface or coating.
  • Apply a thin layer of thread compound or lubricant to the gage and the thread to be inspected. This will reduce friction and wear and improve the accuracy and repeatability of the measurement.
  • Align the gage and the thread carefully and insert the gage gently. Do not force the gage or use excessive torque. Rotate the gage slowly and smoothly until it reaches the reference point or the hand-tight position.
  • Check the fit of the gage and the thread. If the gage goes in smoothly and snugly, the thread is acceptable. If the gage is too loose or too tight, the thread is out of tolerance and needs to be repaired or replaced.
  • After using the gage, remove it carefully and clean it again. Store the gage in a protective case or container to prevent any damage or corrosion. Keep the gage in a dry and cool place, away from direct sunlight or heat sources.
WPAMMT-1-P 1" AMMT Thread Plug Gage call
WPAMMT-1-R 1" AMMT Thread Ring Gage call
WPAMMT-1-1/2-P 1-1/2" AMMT Thread Plug Gage call
WPAMMT-1-1/2-R 1-1/2" AMMT Thread Ring Gage call

MT is Macaroni Tubing, AMT is American Macaroni Tubing, AMMT is American Mining Macaroni Tubing. The three aforementioned names are different names given to the same basic threaded connection.


American Mining Macaroni Tubing (AMMT) is a type of threaded connection used in the oil and gas industry for small-diameter tubing. AMMT threads have 6 threads per inch and a taper per foot of 1-1/2". The standard sizes range from 3/4 up to 2-1/16".


If you have any technical questions; our team of engineers has served on many different API gaging subcommittees with over 100 years of experience. We are here to assist you with any questions or special requirements you may have.

You can contact us at: 888-400-4243 with any questions or quoting you require or email your prints to quote@westportcorp.com.