Bag of 2 screws + 2 M4 nuts Nickel plated. This presentation contains 500 units of M4 screws and nuts that are installed together creating the perfect complement for areas where it is essential that the elements to hold are almost imperceptible. The heads of both pieces have a diameter of 10mm and a thickness of 1.2mm, which gives it the flat characteristic. The nut measures 29mm long by 13mm on average. The mating hole for the screw is 5mm in diameter. The screw has a length of 14 mm counting the head and both have been made of steel with a nickel-plated finish.