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Test couplings with poppet valve (SKK) and accessories from the STAUFF Test 12 series with connection thread S12.65x1.5, available with male threaded stud, with straight 24° tube fitting, with 24° taper / O-ring (DKO), or as bulkhead version. Available in steel with high-quality zinc/nickel coating, or optionally in V2A and V4A stainless steel. Maximum operating pressure of 630 bar. Coupling under pressure up to 400 bar. Knurled cap made of metal.