B&M Machine is a third-generation, family-run precision machine shop in Belleville, New Jersey, making tight-tolerance CNC-milled and turned parts with finishing and inspection handled under one roof. Founded in 1947 as a fastener manufacturer, the shop spent its first four decades serving aerospace before expanding into contract work for industrial, pharmaceutical, and custom-hardware customers. Its 10,000-square-foot facility retains that aerospace discipline while producing both precision components and its own spring-pin insertion tool.