John GuestAcetal Copolymer Tube Fitting, Straight Adaptor, 3/8" Tube OD x 1/2" NPTF Male (Pack of 10)

Despite it being nptf rated (nptf does not require seal vs npt) I still had to use teflon tape for the threaded part so it wont leak.

I needed over 2 dozen “push-to-connect” fittings for building a Reverse Osmosis system for my maple syrup operation. Having used John Guest fittings before I knew they would fit the need. They grip tight, but still allow easy (hand) removal.

Easy to use well built

I just used these NSF 61 rated connections for a water filter. The 1/4 inch NPT fit well into the filter and the 3/8" OD PE tubing slid in fine. No leaks.

quite possibly the best match for 3d printer coupling. just needed to drill a 5/32" hole thru the bottom and could push a 4mmod tube tight through.

Needs PTFE tape to ensure that it doesn't leak, other than that it's excllent

Good quality, easy to replace old connectors on water filter.

I received this product. I ordered the pack of 10 for 23 dollars and I only received 1 fitting. I never leave bad reviews but really, this is very frustrating. I would of gave zero stars if that was possible.

no leaking and well made

Per il resto funziona

Works exactly as I wanted it to.

Great fittings

raccordo inutilizzato ma avrebbe funzionato per lo scopo