Image Image Acetylene Coupling Left Hand Thread x Hose Shank Jump to Section Product Options Related Products Product Options Part Number Hose ID Female Thread Female Thread Size Material 1540306K 3/16" UNF 3/8"-24 Brass 1540309K 3/16" UNF 9/16"-18 Brass 1540409K 1/4" UNF 9/16"-18 Brass 1540509K 5/16" UNF 9/16"-18 Brass 1540609K 3/8" UNF 9/16"-18 Brass Related Products Image Oxy-Acetylene Adapter Left Hand Thread x NPTF Image Oxy-Acetylene Ferrule