Hot Forged Hub Nuts:- Diameter Range: M16 to M32.Grades: c45, 4140 etc.Finish: Black, Zinc & Hot Dip Galvanizing. Features:- - Constructed from high quality steel to secure your hub assembly to the wheel- Manufactured from high-quality, rust resistant materials for durability- Direct replacement for a proper fit every time- Easy to install- High Quality Zinc Plated Wheel Bolts & Nuts- Perfect for using on extra long studs where a capped nut bottoms out on the stud