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Categoría de productos de Screw, somos fabricantes especializados procedentes de China, Anchor Screw, Chipboard Screw proveedores / fábrica, de alta calidad al por mayor productos de Machine Screw I + D y fabricación, tenemos el perfecto servicio y soporte técnico post-venta. Esperamos contar con su cooperación!
China Screw Proveedores
A screw, or bolt, is a type of fastener characterized by a helical  ridge, known as an external thread , wrapped around a cylinder. Some screw threads are designed to mate with a complementary thread, known as an internal thread, often in the form of a nut or an object that has the internal thread formed into it. Other screw threads are designed to cut a helical groove in a softer material as the screw is inserted. The most common uses of screws are to hold objects together and to position objects.