special shape spiral wound gasket antileak of spiral wound gasket includes: antileak ga 01101 basic type spiral wound gasket antileak ga 01102 spiral wound gasket with inner ring antileak ga 01103 spiral wound gasket with outer ring antileak ga 01104 spiral wound gasket with inner and outer ring antileak ga 01105 spiral wound gasket for heat exchanger antileak ga 01106 special shape spiral wound gasket antileak ga 01106 special shape spiral wound gasket are used for boiler hand hole and tube cap assemblies. they are available in round, oval, obround, square, pear and diamond shapes. please note style t gaskets rely on internal pressure in the boiler to properly seat the gasket. this means, when a hydrostatic test is performed on the gasket, the pressure exerted against the plate will further compress the gasket and it is necessary to tighten each nut to compensate for the additional compression of the gasket under load. please log on our website for more details of antileak ga 01106 special shape spiral wound gasket and other products.