Round head
Countersunk head
Raised countersunk head
Cheese
Round head with collar
Low cheese head
Raised cheese
GB/T 2673-2007
6-Lobe 90° flat head screws
ISO 14581-2013
6-Lobe 90° flat head screws
Q 258-1999
6-Lobe 90° flat head screws
GB/T 2673-1986
6-Lobe 90° flat head screws
ISO 14582-2013
6-Lobe 90° flat head screws
ISO 14582-2018
6-Lobe 90° flat head screws
Q 258-2012
6-Lobe 90° flat head screws
QC/T 856-2011
6-Lobe 90° flat head screws
GB/T 2673G-2007
6-Lobe 90° flat head screws with pin
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