Size 5 PCS Color M6*50mm Material Steel Countersunk Head Style About this item< /p> Standard type hex nut and washer screw combination set, best use for installation and fixing. Stable, corrosion resistant, corrosion resistant. moisture, can be used outdoors and in humid environments Cross flat head machine screws are made of high hardness stainless steel, solid, not deformed, wear-resistant and durable Deep thread design, uniform force, good fixing strength to different materials, not easy to fall off. Micro screws are suitable for cameras, glasses, clocks, electronic products and other devices electrical. Self-tapping screws are widely used in household appliances, office furniture and wooden furniture. Large screws can be used in engineering, construction, bridges and other occasions.