A traditional nut used for all bolting and fastening applications. Plated in Trivalent Chromium (Cr3) Zinc Standard metric thread Please note boxed are Class 8 to DIN 267-4" Thread Dia. mm: M5 Socket Size mm: 8 Height mm: 4.0 Thread Type: Metric Finish: Zinc & Clear Cr3 Material: Carbon Steel Timco Hex Full Nuts - Zinc (Size M5 - 1000 Pieces) in Silver