Bolt Base M5 ( 5mm )A2 Stainless Steel Hexagon Left Hand Thread Full Nuts Hex Reverse Nut - 2 Pack Corrosion Resistant A2-70 Stainless Steel Left Hand Hex Full Nuts - DIN 934 5mm Metric Thread, M5 - 0.8mm Pitch Spanner/ Wrench Size- 8mm Not Suitable For Replacing High Tensile Fasteners