Size: 5/8 Body with 3/4 NPT Thread. This 5/8 coupler connects to its male equivalent. Benefits: Flush face valve design minimizes fluid loss and air inclusion. Zinc-nickel plating provides superior corrosion resistance. Hardened steel construction with hardened sleeves. Allows for minimal pressure drops. Locking sleeve helps prevent accidental disconnects. Nipple seal resists blow-outs. Interchangeable with other ISO 16028 standard couplings. Features: 5,076 PSI rating. 39.63 GPM Max Flow Rate. 20 GPM Nominal Flow Rate. Buna-N Seals with Teflon backup ring can operate up to 250° F. Female Face Diameter: 1.65 (42mm). Female Length: 3.43 (87mm). Hex: 1.42 (36mm).