Dixon U-Series Universal Interchange Pneumatic Female Coupler SKU Body Size Threads Material Length OD Hex Inch 2UF2-B 1/4 1/4-18 NPT Brass 2.32 0.92 3/4 2UF3-B 1/4 3/8-18 NPT Brass 2.32 0.92 3/4 3UF3-B 3/8 3/8-18 NPT Brass 2.54 1.09 15/16