[Features]
· Hex head section has spherical surface.
· The spherical surface is hardened.
· Superior wear resistance.
· Lock nuts are included with all products.
· Material / finishing: main body: S45C with hardened spherical surface 45HRC-) SSB-B with ferrosoferric black oxide coating SSBS-B with hardened spherical surface. 40HRC-).
· Nut: SSB-B with SS400 trivalent chromate processing SSBS-B is SUS304