Material:Stainless Steel Product Name:Nylon Nut Size and Quantity:M2-M8.30 pcs;M10-M12.10 pcs;M14-M16.5 pcs;M20.2 pcs. This nut is suitable for replacement of various parts such as garages, workshops, boats, home office fasteners, construction sites, farms, engineering, mechanical trade, DIY.Features: 1. Material: Durable 304 stainless steel. Compared with normal stainless steel, it is safer, more durable, non-toxic and corrosion resistant. It is of high hardness and not easy to deform. It can be used in humid outdoor environment. 2. Head Type: Hex 3. Features: Nylon insert eliminates the need for lock washers. The nylon insert bonds to the male thread to help prevent loosening. Ideal for high vibration applications. 4. Hex Nut Set: in different sizes, which means you will have many options for creating, repairing, building or mounting. Note: 1. Please allow 0-2mm errors due to manual measurement. Thank you for your understanding. 2. The products contain small parts, please keep away from children to prevent them from being swallowed by mistake