This Buna-N ("Nitrile") rubber gasket, P/N 0015-00079, fits many 4-bolt hole fuel senders and gauges, including Rochester Gauges.
Gauge models include, but are not limited to:
6580-00164, 6580-164, 6580-00203, 6580-203.
This gasket is to be used when the flange does not have a recessed area for the standard ring gasket that mates up with the 22 series adapters. Many vintage Boston Whalers would benefit from this gasket to keep sea water and debris from getting stuck between the gauge head and the flange.
