No. 12 Drain plug o-ring. Original: 333572

A O-ring a ring of rubber, which is between two parts in gas-tight or liquid-tight should be merged. An o-ring is a kind of gasket in such as a breech of Johnson or Evinrude outboard motor. The o-ring on the round shape as in the letter O.

An o-ring into a Groove which is in one of the two parts is machined to connect. The other part connect flat on the o-ring. Both parts are then linked together that the pressure on the o-ring inside hermetically sealing the outside.

Because the pressure, the ring deforms a o-ring should be replaced after the receiver of the connection before the connection is made.

O-rings are one of the simplest, and most useful connection designs ever developed. They are available in various metric and inch sizes. The size is specified by the inner diameter of the ring and the cord diameter.

The flexible aspects of rubber O-rings fits imperfections in the mounting parts, therefore, is the most widely used material rubber <./p>