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lobke fastener gaskets are mechanical seals between two objects, typically used as spacers to prevent pressure and corrosion between the two objects. They are also used to distribute load on threaded fasteners and prevent leakage in pipelines due to natural thermal expansion and contraction. Belleville washers, wave washers, wear-resistant pads, preload indicators, locking devices. Since machined surfaces cannot be perfect, gaskets are used to fill irregularities. Materials include stainless steel and carbon steel (iron). Gaskets are formed by winding metal strips (generally v shaped metal strips) with non-metallic strips into a ring.