Bolt for Security Seal

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;
• an electrically insulating layer, wherein between said first and second locations said insulating layer is disposed between said conductive layer and said elongate part, said insulating layer including aluminum oxide;
• 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.

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, said electrically conductive layer being one of an amorphous metal and stainless steel;
• 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.