Patent ID: 7612669

Claim:
An apparatus comprising a seal bolt that includes: an electrically conductive elongate part having a portion extending between first and second locations on said bolt that are spaced in a direction lengthwise of said elongate part; an electrically conductive layer that, between said first and second locations, is spaced from said elongate part and includes a strip extending along said elongate part from said first location to said second location, wherein at each point along the length of said strip from said first location to said second location said strip has a width in a direction circumferentially of said elongate part that is substantially less than a circumference of said elongate part at that point; an electrically insulating layer, wherein between said first and second locations said insulating layer is disposed between said conductive layer and said elongate part; and structure that electrically couples said elongate part and said conductive layer at a third location, said second location being between said first and third locations in the direction lengthwise of said elongate part.