Inert Arc Nuts Brass Hex B-Size 5/8 in - 18 Water Western Enterprises Inert Arc Nuts WARNING: This product can expose you to Lead a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Thread - TPI or Pitch: 5/8 in - 18 Wt.: 0.05 lb CGA No.: CGA-033 Shape: Hex Body Material: Brass Type: Nut Size 1: B-Size Gas Type: Water Thread Direction: LH Pressure [Max]: 200 PSI Connection Type: Male