NPT threaded black 3/8 NPT plug, safe for all alcoholic fuels and used for Nuke Performance motorsports fuel rails. The 3/8" NPT range is used on Nuke Performance: Nuke Performance Motorsports fuel rails When tightening, thread sealant must be used to avoid leakage as it is a conical thread. For alcoholic use, use PTFE thread seal. PTFE thread seal Part # : 700-05-201 If you wish to change or complement the use of fittings of the highest quality, we recommend that you use our fittings which are designed to withstand high power and excessive wear and in the right combination with the products they were intended for. Quantity : 1pc