I used a pair of these to plug the check holes in my sprinkler vacuum interrupter when the check valves started leaking. They worked as expected. Pros: True 1/8" MNPT. Very smooth surface and thread. Withstands Teflon tape and tightening with standard Allen wrenches with ease. A heck of a lot cheaper than a big box. In fact, this pack from Revain is only slightly more expensive than buying from a major online auction from abroad, and delivered in 2 days instead of weeks of waiting.
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