Comparison : Item # 341-258-42, 1/4 Inch O.D. Tube High-Performance Polymer Push-To-Connect Stem to Male BSPT Straight Adapter
Item # 341-258-66, 3/8 Inch O.D. Tube High-Performance Polymer Push-To-Connect Stem to Male BSPT Straight Adapter
Item # 341-258-86, 1/2 Inch O.D. Tube High-Performance Polymer Push-To-Connect Stem to Male BSPT Straight Adapter
Item # 341-258-88, 1/2 Inch O.D. Tube High-Performance Polymer Push-To-Connect Stem to Male BSPT Straight Adapter