GOST R52854-2007
Hexalobular head bolts with small flange
GOST R52855-2007
Hexalobular head bolts with large flange
GOST R55739-2013
Heavy hexagon flange bolts with reduced shank-Type F
GOST R55739-2013
Heavy hexagon flange bolts with reduced shank-Type U
GOST R55739-2013
Hexagon bolts with flange-heavy series-Type F
GOST R55739-2013
Hexagon bolts with flange-heavy series-Type U