Threaded recessed hex plugs cap a fitting or piping end using an inside hex socket, and are available in common NPT threaded connection sizes. NITRA brass recessed hex plugs are rated for a maximum pressure of 800 psi, and work well with air, water, oil, oxygen, nitrogen or argon.
NITRA® Threaded Brass Air Fittings - Recessed Hex
NITRA threaded brass pneumatic fittings in 10 different
Brass Air Fittings NITRA brass air hose fittings are
machined from quality brass bar stock or forgings. They work well
with air, water, oil, oxygen, nitrogen and argon. Available in
most popular styles and sizes, the fittings all have NPT threaded