A one-part gasket that is securely connected to mechanical equipment is used to reduce pressure to increase contact area, prevent loosening and protect parts and screws. 2 Applications are: automobiles industry, trucks, passenger cars, construction machinery, wind power generator equipment, agricultural machinery, foundry industry, excavation equipment, shipying, mining machinery, utilities, railway transportation 3. Surface treatment: cleans bright 4. Standard Type:5 Standard German Product Specifications: M3 is 0.3 inch (8 mm) 10 PCS M3 is 0.5 inch (12 mm) 10 PCS M3 is 0.6 inch (16 mm) 10 PCS M4 x 0.4 inch (20 mm) 10 PCS M4 x 0.5 inch (10 mm) PCS M4 is 10 mm) 10 PCS M5 M5 12mm 10 PCS M5 16mm 10 PCS M5 M5 10mm 10 PCS X M5 10 PCS X M5 X 10 PCS X M6 X 8mm 10 PCS M612mm 10 PCS 16mm 10 PCS M6 is 0.8 inches (20 mm) 10 PCS Nut M345 PCS Nut M445 PCS Nut X XM545 PCS Nut M645 PCS Flat Washer M345 PCS Flat Washer M445 PCS Flat Washer M545 PCS Flat Washer M645 PCS Wrench M5 M10 * 5mm 1 PCS 6 wrenches M8 * 4mm 1 PCS wrench M6 * 3mm 1 PCSPCS Product Accessories: Hex wrench