Hexagonal nut with a spherical bearing surface (type 1). OS BERVEL 37841295-010-2017. Thread diameter: М16(S27), М20(S30), M20(S32). Strength class: 5;8;10. Coating: hot-dip galvanizing.

Bolt for the assembly of engineering structures and artificial road structures of corrugated metal, resistant to corrosion damage (BERVEL Organization Standard). Thread diameter: M16, M20. Strength class: 5.6; 8.8; 10.9. Coating: hot-dip galvanizing.