Image Venting EZ Boss-Lock Cam & Groove Type H Dust Cap Unlike standard Cam and Groove, Venting EZ Boss-Lock is rated for air service. The Maximum PSI varies with size and material. Drill down on a specific part number to see the full details. Markets Agriculture & Forestry, Chemical Processing, Construction, Energy / Oil & Gas, Transportation, Steel Processing, Mining Product Options Part Number Size Material Gasket ALHEZ200 2" 356T6 Aluminum Nitrile ALHEZ300 3" 356T6 Aluminum Nitrile ALHEZ400 4" 356T6 Aluminum Nitrile RLHEZ200 2" 316 Stainless Steel Nitrile RLHEZ300 3" 316 Stainless Steel Nitrile RLHEZ400 4" 316 Stainless Steel Nitrile