We are an authorized distributor of Stauff test 20  couplings and accessories. Test couplings with ball valve (SMK) and poppet valve (SKK) and accessories from the STAUFF Test 20 series with connection thread M16x1 according to ISO 15171-2, available with male threaded stud, with straight 24° tube fitting, with 24° taper / O-ring (DKO), or as bulkhead version. Available in steel with zinc/nickel coating or in V2A and V4A stainless steel. Maximum operating pressure of 630 bar. Coupling under pressure up to 400 bar. Self-locking knurled cap made of metal. Optional: Hexagonal cap made of metal or plastic cap.