Caja surtida - Tornillos - Juego combinado M4 de 320 piezas, simple/doble, con aislamiento de nailon, arandelas y tuercas

320 pieces M4 male and female nylon hexagonal gasket support Nut thread column PCB motherboard matching kit, black Single and double nylon insulation column, balanced pad, screw nut box Galvanized surface treatment: screws and nuts are treated with a galvanized surface for excellent corrosion-resistant performance Nylon insulation column sets are widely used for insulation and assembly in electronic products, instruments, communication equipment, and other fields