Bolt Base A2 Stainless Steel Half Lock Nuts Jam Nuts M6 X 1.0mm Pitch - 10 Corrosion Resistant A2-70 Stainless Steel Hex Thin Nuts- DIN 439 6mm Metric Thread, M6 - 1.0mm Pitch Spanner/ Wrench Size- 10mm Not Suitable For Replacing High Tensile Fasteners