Rack Mount unit of length ~ Horizontal Pitch (HP)

A common measurement for rack mount enclosures is Horizontal Pitch (HP). HP can be defined as “a unit of length defined by the Eurocard printed circuit board standard used to measure the horizontal width of rack mounted electronic equipment, similar to the rack unit (U) used to measure vertical heights of rack mounted equipment.” 1HP=.2" or 1HP=5.08mm

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