GB/T 819.2-2016
Countersunk flat head screws with type Z cross recess(shallow)
GB/T 13806.1-1992
Cross recessed cheese head screws for precision -Table1
GB/T 13806.1-1992
Cross recessed countersunk head screws for precision -Table2
GB/T 13806.1-1992
Cross recessed raised countersunk head screws for precision -Table3
GB/T 5782-1986
Hexagon head bolts
GB/T 5782-2000
Hexagon head bolts
GB 819-1976
Countersunk flat head screws cross recess
GB 818-1976
Cross recessed pan head screws
GB/T 818-1985
Pan head screws with type Z cross recess
GB/T 818-1985
Pan head screws with type H cross recess
GB/T 818-2000
Pan head screws with type H cross recess
GB/T 818-2000
Pan head screws with type Z cross recess
GB/T 898-1988
Double end studs b1=1.25d-type A
GB/T 898-1988
Double end studs b1=1.25d-type B
GB/T 5789-1986
Large Hexagon Head Flange bolts—Type A
GB/T 16674.1-2004
Hexagon flange bolt of rough flange-Type F
GB/T 16674.1-2016
Hexagon flange bolt of Fine rod flange-Type U
GB/T 16674.1-2004
Hexagon flange bolt of Fine rod flange-Type U
GB/T 5787-1986
Hexagon head flange bolts-Type B
GB/T 67-2008
Slotted pan head screws
