ABSTRACT
A similarly favorable load cycle performance is shown only by the surface-compacting ribbed flange bolt. Its disadvantages include high costs, the relatively large amount of space required for flange-bearing surface, and the unavoidable damage to the surface of the braced parts around the bolt-bearing surface. Teeth on bolts with a sawtooth flange penetrate the bearing surface of the braced material. Bearing surfaces of the head and the nut are damaged during loosening, limiting their possible applications. Parts with hardened surfaces cannot be reliably connected.
