Earl's Stat-O-Seal - 0.438 in ID - Rubber O-Ring (Pair) H764009 They come attractively skin packaged

They come attractively skin packaged in (10) packs

Innermost layer: 95% Meta Aramid

mounting bracket and hardware

646 in Oval Port

Mating Connector

Earl's Stat-O-Seal - 0.438 in ID - Rubber O-Ring (Pair) H764009 They come attractively skin packagedThe Stat O Seal is very simply the best sealing washer available. It consists of a synthetic rubber "O" ring mechanically locked to the I. D. of an aluminum washer. When tightened the "O" ring is compressed, forcing the sealing surfaces around the bolt shank. They will form a positive seal over a temperature range of 85? to +450? F. They provide the advantages of an "O" ring type seal without the necessity of machining "O" ring grooves into the part.