" High Quality Material M4 furniture machine screws are made of 4.8 grade carbon steel, nickel plated on the surface, hard and smooth, not easy to rust or break, long lifespan. Thread TypeThis round countersunk head screw kit is standard metric thread (full thread), the thread is very clear to achieve good fixing effect, with good stability and strong performance. Modest SizeTotal length of M4 machine screw is 30mm, it is enough length to fix lock cylinder or profile cylinder in mortise lock as an alternative to old slotted screws. Cross Round Head Design The machine screws adopt a "+" hole on the top, which can be screwed and unscrewed much better. The connection part is flat, which makes it more suitable for the surface when using, and not effecting thefurniture appearances. Wide ApplicationThese cross countersunk screws are suitable for appliances and mechanical engineering: metal connections, furniture construction, upholstery, car repair shop, ventilation technology, etc. Specification Product Name: Cross Head Machine Screw Material: Steel Color: Silver Size: M4 x 30mm Quantity: 60 pieces Net weight: 157g Package contents 60 x Cross Head Machine Screws Warm advice Manual measurement, please allow slight errors, please refer to the actual product. Thank you for your understanding "