Milton 1863-8 3/4" MNPT Twist Lock Universal Coupler - Box of 10 3/4" male national pipe thread Maximum pressure of 150 pounds per square inch Maximum temperature of 160 degrees Fahrenheit Can be used with other twist lock universal couplers sized 1/4" to 1" Two claws are great for construction, highway maintenance, mining mobile compressors, agriculture and tool rental shop applications