factory Smooth surface Rubber Air water hose 6mm-51mm Hot sale 20 bar 300 psi surface 8mm flexible rubber air hose

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  • Safety requirements for pressure testing GS4

    Also known as ball-seat hose nipples, these fittings consist of a barbed shaft with a rounded end that sits inside a female threaded nut. When mated with a male threaded fitting, the rounded end presses tightly against the inside of the male threads for a better seal than a single-piece fitting. Once assembled, insert the barbed end into hose and secure with a clamp or a crimp-on hose ferrule.

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