The Spareage vogue BS seal could be a secured seal combination of NBR Seal Ring and a metal keep a copy ring. The NBR Seal Ring is secured dead to the inner portion of the metal keep a copy ring. once a bolt is tightened with BS seal, the NBR Seal Ring having a quadrilateral Cross section gets compressed to AN extent wherever the bolt can't be any tightened owing to the metal keep a copy ring. beneath such state, the NBR Seal Ring not solely includes a preload pressure on the pairing surface on top of the pressure being sealed, however additionally forms the profile of a U ring to resist higher pressures. The BS seal may also be provided in extreme temperature resistant material for the asking.