All bolts shall be produced in confarmance with EN 10083-1 standard and shall have isometric threads conforming to DIN 13-1.

Strenghth classification shall be 6.8 , 8.8 , or 10,9 in compliance with the requirements of en20898-1 .

All nuts shall be produced from hexagonal shaped cold and \ or hot rolled S355J2G3(St52-3)quality non alloyed steel and \ or AISI\SAE 1030 quality low alloyed steel.