Digi-Key carries a large selection of product for Shunts and Jumpers in both through-hole and surface-mount product. Jumpers are a convenient way to cross a trace on a printed circuit board when there is no other option. Shunts can be either soldered in a board or they can be removable when used with a male header. This would allow such things as configuration of a circuit board or re-routing a signal on a board.
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