JB/T 6686-1993 12-Piont flange bolts is a fastener product with special head shape and flange face.
12-Piont flange bolts are widely used in various mechanical equipment, engineering structures, automobile manufacturing and other fields, especially in the need for high strength and good sealing connections play an important role.
1. Head type: The head type with 12 corners increases the contact area with the contact surface and improves the stability and reliability of the connection.
2. Flange face: The bolt head has a flange face, which helps to distribute stress and reduce the concentration of pressure on the contact surface of the head, while increasing the tightness of the connection.
3. Various specifications: The product specifications are diverse, covering a variety of thread specifications from M6 to M52, to meet the needs of different application scenarios.