![M13.5×1 LH Fluted Thread Protector [0.625" OD, 0.440" OAL] - SKU#9140](https://hughesprecision.com/wp-content/uploads/2017/08/DSC_0008-scaled.jpg)
![M13.5×1 LH Fluted Thread Protector [0.625" OD, 0.440" OAL] - SKU#9140 - Image 2](https://hughesprecision.com/wp-content/uploads/2017/08/DSC_0009-scaled.jpg)
![M13.5×1 LH Fluted Thread Protector [0.625" OD, 0.440" OAL] - SKU#9140 - Image 3](https://hughesprecision.com/wp-content/uploads/2017/08/DSC_0007-scaled.jpg)
Description
M13.5×1 LH Fluted Thread Protector [0.625″ OD, 0.440″ OAL] – SKU#9140
This is a M13.5×1 LH machined thread protector which is 7/16″ long with a fluted 5/8″ OD. It fits barrels and adapters using M13.5×1 LH threading, commonly found on Glock H&K, and Sig SAUER 9mm Handguns. Don’t run the risk of damaging the threads when muzzle accessories are not being used. Thread Protector is High Quality 4140 Steel with a Black Oxide Finish.
Please measure the length of the thread on your barrel or adapter to be sure that 7/16″ LONG will cover your thread.
ALWAYS VERIFY YOUR MUZZLE DEVICE IS RATED FOR THE CALIBER YOU INTEND TO SHOOT
ALWAYS VERIFY PROPER ALIGNMENT BEFORE FIRING
![M13.5×1 LH Fluted Thread Protector [0.625" OD, 0.625" OAL] - SKU#9145](https://hughesprecision.com/wp-content/uploads/2017/08/DSC_0002-1-scaled-500x500.jpg)
![M8×0.75 RH Fluted Thread Protector [0.625 OD, 0.440" OAL] - SKU#9100](https://hughesprecision.com/wp-content/uploads/2018/10/DSC_0025-500x500.jpg)
![9/16"×24 RH Fluted Thread Protector [0.750" OD, 0.625" OAL] - SKU#9490](https://hughesprecision.com/wp-content/uploads/2016/11/DSC_0001-6-scaled-500x500.jpg)
![M9×0.75 Fluted Thread Protector [0.625" OD, 0.440" OAL] - SKU#9103](https://hughesprecision.com/wp-content/uploads/2018/10/DSC_0023-500x500.jpg)
Eric Thiesen (verified owner) –
Another nice, fluted barrel thread protector from Hughes. I got this one for my Glock 17, which is Austrian made and has metric thread instead of the usual 1/2-28 seen on many American firearms with bore diameters in the .22 to .30 caliber neighborhood. Be sure to measure the length of your thread. NOTE: this is just the protector. If you need an o-ring, either use the one that came with your firearm or order a bag of a hundred Viton o-ings like I did. I think the fluted finish is a nice alternative to knurled. Next I might get some stainless thread protectors just because. Quick shipping, quality product, decent prices. If you have a firearm with a threaded barrel, you should be able to find something here. Be sure to check out the adapters and extensions also. I was able to order enough stuff to get free shipping.