尼龙搭扣，也称“魔术粘”、“魔鬼沾”、“魔鬼毡”、“魔术贴”、“黏扣带”，是一种纤维紧固物，发明公司为“维可牢”（Velcro）。通常由两条织物组成，一条表面覆有环状结构，另一条表面覆有钩状结构。当两条织物用力压紧时，钩与环相结合，形成暂时紧固的状态。若希望两者分离，只需用力将其分开即可。实际上第一条尼龙搭扣是纯棉的，但由于其后发现不实用而改用尼龙。维可牢注册于1948年的专利在1978年失效，但维可牢已成为了家喻户晓的注册商标，所以维可牢也常在西方语境中作为尼龙搭扣的代称。

Hook-and-loop fasteners, hook-and-pile fasteners, or touch fasteners (known as Velcro after a company that produces them) consist of two components: typically, two lineal fabric strips (or, alternatively, round "dots" or squares) which are attached (sewn or otherwise adhered) to the opposing surfaces to be fastened. The first component features tiny hooks; the second features even smaller and "hairier" loops. When the two components are pressed together, the hooks catch in the loops and the two pieces fasten or bind temporarily during the time that they are pressed together. When separated, by pulling or peeling the two surfaces apart, the strips make a distinctive "ripping" sound.