Bolt Base A2 Stainless Steel Hex Serrated Flange Nuts Flanged Nuts M10 X 1.50mm Pitch - 5 Corrosion Resistant A2-70 Stainless Steel Serrated Flanged Nuts- DIN 6923 10mm Metric Thread, M10 - 1.50mm Pitch Spanner/ Wrench Size- 15mm Not Suitable For Replacing High Tensile Fasteners