a gasket consisting of a flat ring of rubber or plastic; used to seal a joint against high pressure
A circular style gasket with a circle in the cross section Offset-Head Spike The most commonly used rail fastener The head is forged entirely on one side of the spike and bears down on the upper surface of the rail's broad base
A circular gasket, usually made of rubber O-rings come in different shapes and sizes On soda kegs, they are used to ensure a gas-tight seal on the main lid, the liquid and gas fittings, and between the dip tubes and the keg body O-rings will eventually deteriorate, and must be replaced occasionally
functions as a seal through the mechanical deformation of the elastomeric compound by mating metal surfaces This creates a condition of zero clearance which blocks the liquid or gas being sealed The pressure which causes the O-Ring to move is supplied by mechanical pressure or squeeze generated by proper gland design, material selection, and by the system pressure transmitted by the fluid itself