Image HTZ-Series Correct Connect® Flushface Female Threaded Coupler Product Options Part Number Female Thread Size Body Size Female Thread Material 4HTZF4 1/2" -14 1/2" NPTF Steel 4HTZF6 3/4" -14 1/2" NPTF Steel 4HTZOF4 3/4" -16 1/2" ORB Steel 4HTZOF5 7/8" -14 1/2" ORB Steel 4HTZOF6 1-1/16" -12 1/2" ORB Steel