Hex with flange
Round head
Countersunk head
Raised countersunk head
Hex with collar
Round head with collar
Bugle head
QC/T 873-2011
6-Lobe 90°oval head self drilling screws with tapping screw thread
QC/T 874-2011
6-Lobe 90°flat head self drilling screws with tapping screw thread
QC/T 875-2011
6-Lobe pan head self drilling screws with tapping screw thread
Q 200-2012
Hexagon flange head drilling screw with tapping screw thread
Q 202-2012
6-Lobe pan head self drilling screws with tapping screw thread
Q 203-2012
6-Lobe 90°flat head self drilling screws with tapping screw thread
Q 204-2012
6-Lobe 90°oval head self drilling screws with tapping screw thread
Q 209-2012
Hexagon head self-drilling and tapping screws with collar