Consisting of flat metallic gasket and trapezoidal, vulcanized-on elastomer bead of 70 EPDM 291, Hygienic Usit creates dead-space-free, static seal when used with screws in splash zones of dairy operations. This makes it impossible for microfilms to form between screw head and contact surface. In areas with product contact, seals are used with polished screws to facilitate cleaning. Product seals static machine parts against liquid and gaseous media and meets US/UK food industry requirements.