Cylinder head hexagonal screw, also referred to as hexagonal bolt, cup head screw, hexagonal screw. Grade: 4.8,8.8,10.9,12.9. Its head is internal hexagonal head, also cylindrical. Material is divided into stainless steel and carbon steel. Grade 8.8-Grade 12.9 internal hexagonal cylindrical head screw is called a high strength and high grade internal hexagonal bolt.1. Now, we professionally supplies customers with our main products And our business is not only the "buy" and "sell", but also focus on more. We target to be your loyal supplier and long-term cooperator in China. Now, We hope to be the friends with you. 2. Our company upholds the spirit of "innovation, harmony, team work and sharing, trails, pragmatic progress". Give us a chance and we will prove our capability. With your kind help, we believe that we can create a bright future with you together. 3. The credibility is the priority, and the service is the vitality. We promise we have the ability to provide excellent quality and reasonable price products for customers. With us, your safety is guaranteed. 4. Corporate goal: Customers' satisfaction is our goal, and sincerely hope to establish long-terms stable cooperative relations with customers to jointly develop the market. Building brilliant tomorrow together!Our company regards "reasonable prices, efficient production time and good after-sales service" as our tenet. We hope to cooperate with more customers for mutual development and benefits. We welcome potential buyers to contact us. We look forward to working with you and hope that we can continue to work together!