The common bolt nail head is very thick, difficult to deformation, good if vibration, but also need to be re-screwed; Flange belt a thin part, can be slightly deformed, can lock more firmly. Still have is if go to the hole when, ordinary bolt cannot use a tool, the head of flange bolt is smaller, the flange plate below still has fastening effect, can use special tool to go up to the hole however, with inside hexagon bolt about the same principle. Have again is flange top flat mat to use, in softer, not wear-resisting material on safer, will not cause perforation.
Contact Person: Aimee
Tel: +86 1583201860