Size : M2 M2.5 M3 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30. 【High-quality Stainless Steel and Nylon】: The hex lock nuts made of high-quality nylon and A2-70 stainless steel, making them sturdy, waterproof, rust-resistant.
eBay