STANDARD METRIC: Our M8 screws follow the standardized metric system. Scope of delivery: M8 x 55 mm (10 pieces) / Thread diameter: 8 mm; Thread pitch: 1.25 mm; Cycle. Wide range of applications; Commonly found in machinery, furniture, car and motorcycle repairs, and DIY inventions. Warm tip: The product contains small parts. Do not let children play with it to avoid accidental ingestion. We offer our customers high-quality products. Therefore, we employ professional customer service staff to ensure every customer's satisfaction. If you have any problems after purchasing our product, please contact us. We are always here for you. MATERIAL: 100% 304 (A2-70) stainless steel, high hardness, corrosion resistance, can be used in humid environments and you don't have to worry about rust. STANDARD METRIC: STANDARD SIZE (Tolerance: ±0.005 mm): Even force, centered in the head without offset, not easy to slip; Even pitch, clear screw thread, no residual burrs, firm screw threads can achieve good adhesion.