S-220, 2″ Visegrip Plug without crossbar (Visegrip)
S-220-2, 2″ plated pressure relieving plug 9-15 PSI (Visegrip)
S-250, 2″ hex-head plug with GV-43 gasket (Visegrip II)
S200-1814P, 3/4″ hex head plug vented with GV-41 gasket (Visegrip II)
T-250, 2″ round head plug with GT-73-3 gasket (TOV or TS style)