GB/T 828-1988
Slotted pan head set screws with dog point(long:L>d)
GB/T 70.3-2008
Hexagon socket countersunk head screws
GB/T 70.2-2008
Hexagon socket button head screws
GB/T 70.2-2015
Hexagon socket button head screws
GB/T 70.1-2008
Hexagon socket head cap screws
GB/T 70.4-2015
Hexagon socket button head screws with collar
GB/T 70-1976
Hexagon socket head cap screws
GB/T 79-2007
Hexagon socket set screws with dog point
GB/T 5281-1985
Hexagon socket head shoulder screws
GB/T 5281-1985
Knurled hexagon socket head shoulder screws
GB/T 820-1985
Cross recessed raised countersunk head screws-type H
GB/T 820-1985
Cross recessed raised countersunk head screws-type Z
GB/T 80-2007
Hexagon socket set screwss with cup point
GB/T 822-2016
Cheese head screws with cross recess-type H
GB/T 822-2016
Cheese head screws with cross recess-type Z
GB/T 840-1988
Plastle dlamond knurl haed screws-type B
GB/T 840-1988
Plastle dlamond knurl haed screws-type A
GB/T 78-2007
Hexagon socket set screws with cone point
GB/T 77-2007
Hexagon socket set screws with flat point
GB/T 2674-2004
6-Lobe socket 90° oval head screws
