This part specifies the hexagon socket countersunk head self-tapping screws with thread specifications ST2.9~ST6.3. If other technical requirements are required, they should be selected from current standards (such as GB/T 5280, GB/T 3098.5 and GB/T 3103.1).
GB/T 2670.2-2004 history
2017GB/T 2670.2-2017 Hexalobular socket countersunk head tapping screws
2004GB/T 2670.2-2004 Hexalobular socket countersunk head tapping screws