with one another so that flanges 16 may be connected by nut and bolt sets 18 as is known in the art with continued reference to fig1 and with further reference to fig2 it may be seen that electrical isolation between flanges 16 is accomplished by a plurality of different components associated with each aligned pair of bores 20 here a pair of aligned bores 20 is provided with a sleeve 22 constructed for example of a glass reinforced polymer although other materials such as epoxy phenolic and nomex materials may be suitably employed sleeve 22 is dimensioned to have a length that is about the same as the distance between outer surfaces 24 of flanges 16 and the thickness of gasket 10 interposed therebetween once sleeve 22 has been inserted into a pair of aligned bores 20 insulating washers as described more thoroughly below are placed on either side of bores 20 on outer surfaces 24 of flanges 16 metal washers 28 which can take the form of a spring force exerting component such as a belleville washer are then positioned against washer 26 and bolt 30 is passed through the washers and sleeve 22 after which it is secured by nuts 32 this assembly is undertaken for each of the aligned bores 20 after which nuts 32 may be tightened to compress gasket 10 at a desired pressure the present invention contemplates both improvements to isolation gasket 10 as well as to the use of insulating washer 26 to this end as is illustrated in fig3 5 the construction of isolation gasket 10 may be appreciated in greater detail here it may be seen that isolation gasket 10 includes the gasket body 38 formed by a flat annular metal plate 40 having an opening 44 therethrough.