Hex Kep Nut K Lock Nuts 1. Metric sizes regular Supply M3, M6, M8 up to M12 2. Inch size #8 to 1/2 3. Other sizes customized 4. Class 5, Class 8, Class 10 5. Standard or fine threaded 6. Material can be carbon steel, stainless steel and brass 7. Standard hex nut with tooth washer Surface Treatment Options: Plain, Black, ZP, YZP, BZP, HDG, Nickle, Chrome, Dacromet, Cr3+,Cr6+