4" x 1.5" x1/4" FNPT Tri-Clamp Endcap4" x 1. 5" x1 4" FNPT Tri Clamp Tri Clover Endcap This End Caps come with a 1 4" 18 FNPT Threaded connection and 1. 5" Tri Clamp ferrule welded to the end cap with a sanitary weld. They allow the user to adapt and connect a threaded connection to the 1 4" port on a Tri Clamp lid and the 1. 5" Tri Clamp Connection. These 2 connections are welded on a 4" Tri Clamp End Cap. Specification Material: 304 Stainless Steel Connection Types: 1. 5" Tri Clamp 3"