Features Made of high quality carbon steel, durable. Large contact area, can withstand strong tension. Strong vibration resistance can prevent loosening. Easy and convenient to install, quickly and easily. Widely used in automotive industry, railway vehicle industry, shipbuilding industry, household appliances, construction machinery, commercial machinery, electronic products, engineering plastics, advanced furniture, aluminum die casting and other industries. Features: 1. Made of high quality carbon steel, durable to use. 2. Large contact area, can withstand strong tension. 3. Strong vibration resistance can prevent loosening. 4. Easy and convenient to install, quickly and easily. 5. Widely used in automotive industry, railway vehicle industry, shipbuilding industry, household appliances, construction machinery, commercial machinery, electronic products, engineering plastics, advanced furniture, aluminum die casting and other industries. 6. Available in nine styles for your choice. Specification: Condition: 100% Brand New Material: Carbon Steel Optional style: Interior M2x0.4 Exterior M4. 5x0.5, interior M4x0.7 exterior M6.5x0.75, interior M3x0.5 exterior M5x0.5, interior M5x0.8 exterior M8x1.0, interior M6x1.0 exterior M9x1.0, interior M6x1.0 exterior M10x1.5, Interior M8x1.5 1.25 Exterior M12x1.5, Interior M10x1.5 Exterior M14x1.5, Interior M12x1.75 Exterior M16x1.5 Weight: approx. 9-229g/0.3-8.1oz Length: approx. Interior M2 x 0.4 Exterior M4.5 x 0.5: 6 mm / 0.2 inches. Interior M4 x 0.7 Exterior M6.5 x 0.75: 8 mm / 0.3 inches. Interior M3x0.5 Exterior M5x0.5 : 6mm/0.2in Inner M5x0.8 Outer M8x1.0: 10mm/0.4in Inner M6x1.0 Outer M9x1.0: 12mm/0.5in Interior M6x1.0 Exterior M10x1. 5: 14mm/0.6 inch Inner M8x1.25 Outer M12x1.5: 15mm/0.6 inch Inner M10x1.5 Outer M14x1.5: 18mm/0.7inch Inner M12x1.75 outer M16x1 .5: 22mm/0.9 inch Packing List: 20 pieces of thread inserts Package List