Round head
Countersunk head
Raised countersunk head
Cheese
Round head with collar
Low cheese head
Raised cheese
QC/T 856-2011
6-Lobe 90° flat head screws
GOST 55742-2013
6-Lobe cap screw with large driving feature
GB/T 2673.2-2020
Hexalobular socket high countersunk head screws
ISO 14581-2023
6-Lobe 90° flat head screws without underhead reinforcement
ISO 14581-2023
6-Lobe 90° flat head screws with underhead reinforcement
