BAllstar ALL50814 Red Plastic Plug for -8AN 34-16 Thread, (Pack of 20) ReviewbP PP Allstar ALL50814 Red Plastic Plug for -8AN 34-16 Thread, (Pack of 20) PPlug fits size -8an and 34-16 thread and is made from high-quality red plasticPPlug kit is a must for keeping debris out of lines and hoses. Ideal for keeping internal components of dry sump pumps, fuel pumps, pressure regulators, etc.