The FM explosion venting fastener is mainly applied to the explosion venting structure in the explosion hazard environment. It shall be released at the minimum internal pressure of 20lbs/ft2 (0.96KPa) and the maximum pressure of 40lbs/ft2 (1.92KPa). In the precondition of being capable of resisting the external wind load, the design shall be such that it is released at the pressure as low as possible.