GB/T 29.2-1988
Cross recessed hexagon bolts with indentation
GB/T 31.1-1988
Hexagon bolts with split pin hole on shank
NF E25-801-3-2005
High-strength structural bolting assemblies for preloading-system HR-Hex bolt
NF E27-711-1982
High-strength structural bolting assemblies for preloading-system HR-Hex bolt
NF E25-801-4-2015
High-strength structural bolting assemblies for preloading-system HV
NF E25-114-2011
Hexagon head screws
NF E25-114-2014
Hexagon head screws
EN 14399-10-2009
Twist-off type tension control structural bolts with heavy hex head
ISO 4016-2011
Hexagon head bolts
ISO 4017-2011
Hexagon head screws
ISO 4018-2011
Hexagon head bolts-Full thread
DIN 931-2-1987
Hexagon head bolts
DIN 7990-1989
Hexagon head bolts with hexagon nut for steel structures
DIN 7990-1989
Big hexagon head bolts with hexagon nut for steel structures
DIN 7990-1999
Hexagon head bolts with hexagon nut for steel structures
DIN 7990-2007
Hexagon head bolts with hexagon nut for steel structures
DIN 7990-2017
Hexagon head bolts with hexagon nut for steel structures
ISO 4016-2001
Hexagon head bolts
KS B1002-2001
Hexagon head bolts
KS B1002-2001
Hexagon head bolts-Reduced shank
