Part D Ny-Glass Coupler x Female NPT - 4"
This 4" Part D Coupler x Female NPT fitting is made of Ny-Glass, a fiberglass reinforced nylon and has stainless steel locking handles. This material is better than aluminum in all but extreme heat conditions, and better than polypropylene except in extreme acid conditions. This makes them the closest thing to an ALL PURPOSE COUPLING, that will not cross thread or seize.
Available Part D Sizes