Crimp closure, N 20, alu., pressure release, silver, center hole, no liner 702799

These safety caps are used in Headspace analysis in the high temperature range. The bridges of the cap's scorelines break open at an internal vial pressure exceeding 3 bars (± 0.5 bars), thus releasing overpressure in a crontrolled way. Functionality of the cap is not depending on the design of the vial's crimp neck (beveled top, flat crimp neck).