Standard Steel Ball Valve Lockouts. Easy to use ball valve lockouts Single-piece design makes this small steel ball valve lockouts the perfect tool for securing your valve handles in the off position They prevent valve handle from being turned on. Small Standard Steel Ball Valve Lockout RS ; 882-5923 882-5923. Hole diameter accept 3/8" padlock shackles For use on ball valve sizes from 0.25" to 1" (3/8" lock holes). Large Standard Steel Ball Valve Lockout RS ; 882-5927 882-5927. Hole diameter for 9/32" padlock shackles For use on ball valve sizes from 1.25" to 3" (9/32" lock holes)