Now you can use premium quality ARP fasteners to install most anything on a car, boat, or trailer. You can't beat the gorgeous looks of the specially polished stainless steel nuts and their ability to resist rust. They're truly maintenance free. These nuts feature a traditional hex style, and are size 3/8 - 16. They come packaged five to a card, so they are an excellent choice to go along with 5-packs of ARP bolts (sold separately).