Bolt Base 2.5mm A2 Stainless Steel Nylon Insert Nyloc Nylock Lock Nuts M2.5 X 0.45mm Pitch - 10 Corrosion Resistant A2-70 Stainless Steel Nyloc Lock Nuts- DIN 985 2.5mm Metric Thread M2.5 - 0.45mm Pitch Spanner/ Wrench Size- 5mm Not Suitable For Replacing High Tensile Fasteners