At first glance, the Milton 1859 G Style Plug seems like a reliable option for pneumatic applications with its 3/8" MNPT size and box of five. However, after testing the product, it became apparent that it falls short in some areas. The main issue with this plug is its durability. Despite being marketed as a heavy-duty option, it didn't hold up well under repeated use. The plug itself began to show signs of wear and tear, and eventually failed after a few weeks of use. Additionally, the plug's dSee full review