gasket

n. seal; rope for tying a sail (Nautical)

This article is about mechanical seals. For fractals, see Apollonian gasket and Sierpinski gasket; see also, Gasket (sailing).[image:gaskets.jpg|thumb|right|250px|Some seals and gaskets 1. o-ring 2. fiber washer 3. paper gaskets 4. cylinder head gasket]] A gasket is a mechanical seal that fills the space between two objects, generally to prevent leakage between the two objects while under compression. Gaskets save money by allowing less precise mating surfaces on machine parts which can use a gasket to fill irregularities. Gaskets are commonly produced by cutting from sheet materials, such as gasket paper, rubber, silicone, metal, cork, felt, Neoprene, fiberglass, or a plastic polymer (such as polychlorotrifluoroethylene). Gaskets for specific applications may contain asbestos. It is usually desirable that the gasket be made from a material that is to some degree compressible such that it tightly fills the space it is designed for, including any slight irregularities.
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Noun
1. seal consisting of a ring for packing pistons or sealing a pipe joint
(hypernym) seal
(hyponym) head gasket

(n.)
The plaited hemp used for packing a piston, as of the steam engine and its pumps.
  

(n.)
Any ring or washer of packing.
  

(n.)
A line or band used to lash a furled sail securely. Sea gaskets are common lines; harbor gaskets are plaited and decorated lines or bands. Called also casket.
  

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