Besides aluminum nuts,stainless steel nuts,steel nuts, we also offer nylon nuts. The nylon nuts are fit for nylon screws. The most popular nylon nuts are nylon hex nuts. We have lots of M3 nylon nuts in stock. Black color is most common. If you need other sizes, please feel free to contact me . We will try our best to support you. If you need special packing service including special package boxes, it is also ok for us. Any questions or demand, please feel free to contact us.