Patent ID: 8777278

Claim:
An exhaust flange assembly comprising: first and second flanges for respectively receiving ends of first and second pipes to be joined, said flanges being securable to each other to join said pipes, said flanges, when abutted against each other, having at least two opposing holes therethrough; and fastening means positionable through said opposing holes to secure said flanges to each other, said fastening means comprising, for each pair of said at least two opposing holes: an attachment portion positionable into a first said opposing hole and securable against rotation in said first hole, said attachment portion having an abutting portion outside said first said opposing hole to contact the flange and an engagement portion extending into the first said opposing hole, wherein said securing of said attachment portion against rotation is by said engagement portion, wherein said engagement portion of said attachment portion is configured so as to extend only partially through the first said opposing hole, at least the engagement portion of the attachment portion having a threaded bore, the bore not extending fully through said attachment portion; and a bolt positionable through the opposing hole of the other said flange, for screwing into said threaded bore so as to secure the flanges to each other; and wherein one of said flanges has a recess around each of its said holes, and the other of said flanges has a corresponding protrusion around each of its said holes, each said protrusion fitting into a said recess so as to overlap the planes of opposing surfaces of said first and second flanges.