A traditional nut used for all bolting and fastening applications. Zinc plated for internal use. Plated in Trivalent Chromium (Cr3) Zinc Standard metric thread" Thread Dia. mm: M8 Socket Size mm: 13 Height mm: 6.5 Thread Type: Metric Finish: Zinc & Clear Cr3 Material: Carbon Steel Timco Hex Full Nuts - Zinc (Size M8 - 300 Pieces) in Silver