– November 6, 2019
1/2 x 28 inside threads.. mystery on the outside threads
– January 1, 2020
The inner threads are 1/2-28. The exterior threads are 3/4-16. I imagine they are designed to fit an oil filter for some back woods suppressor rig or something.
Your email address will not be published. Required fields are marked *
Your review *
Notify me of new posts by email.