This listing is for a brand new replacement lever tap for a home brew barrel with a 2" cap. These barrels have a threaded body for the tap to screw into. They do not fit a 4" cap barrel or brewing bucket as they do not have a locknut to fix them and as it is a tapered thread a locknut wouldnt stay on under pressure so dont be tempted to try it.  The tap comes complete with a new rubber washer.