【High Quality Material】: Perfect washers made of A2 standard 304 stainless steel with smooth surface and edges, strong and durable, with excellent corrosion resistance and rust resistance, providing a long service life; suitable for long-term outdoor work.【Features】: M10 Washers, 20pcs, Inner Diameter - 10mm, Outer Diameter (OD) - 30mm, Thickness - 2.0mm.【Practical Function】: Effectively disperses the pressure generated by fasteners, by increasing the contact area, it can protect the parts from damage and prevent the connection between fasteners from loosening. Bolt washers are used to reduce friction, prevent leakage, provide insulation, prevent loosening or distribute stress.【Wide Application】: Ideal for household and mechanical equipment, perfect for stainless steel bolts and nuts and stainless steel screws; home repairs, machine tools, furniture making, DIY, outdoor projects, crafts, equipment, etc.【Precision】: High precision manufacturing can produce the right size washers to fit