Image Oxy-Acetylene Adapter Left Hand Thread x NPTF Jump to Section Product Options Related Products Product Options Part Number Length Male Thread Male Thread Size Material 1580904C 1.30" NPTF Left UNF 1/4" 9/16"-18 Brass 1580906C 1.31" NPTF Left UNF 3/8" 9/16"-18 Brass Related Products Image Image Acetylene Coupling Left Hand Thread x Hose Shank Image Oxy-Acetylene Adapter Right Hand Thread x NPTF Image Oxy-Acetylene Spud Right Hand Thread