Round head
Countersunk head
Raised countersunk head
Hex with collar
Round head with collar
Countersunk head with rib
Bugle head
Raised cheese
Hex chamfered double faces
GB/T 2670.1-2017
6-Lobe pan head tapping screws-type F
GB/T 2670.2-2017
6-Lobe 90°flat head tapping screws-type F
GB/T 2670.3-2017
6-Lobe 90°oval head tapping screws-type F
Q 27A-2012
Hex lobular socket pan head tapping screws-type F
Q 27B-2012
6-Lobe 90°flat head tapping screws-type F
Q 27C-2012
6-Lobe 90°oval head tapping screws-type F
