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 70-1985
Hexagon socket plain heads cap screws
GB/T 70-1985
Hexagon socket knurled heads cap screws
GB/T 70.1-2000
Hexagon socket head cap screws
GB/T 70.2-2000
Hexagon socket button head screws
GB/T 70.3-2000
Hexagon socket countersunk head screws
GB/T 70.1G-2008
Hexagon socket head cap screws with pin
GB/T 70.1-2008
Hexagon socket knurled head cap screws
GB/T 70.1-2000
Hexagon socket knurled head cap screws
GB/T 70.3-2023
Hexagon socket countersunk head screws with reduced loadability
GB/T 70.6-2020
Hexagon socket head cap screws--Fine pitch thread
GB/T 70.6-2020
Hexagon socket knurled head cap screws--Fine pitch thread
