Slot
Cross recess
Hex socket
Square socket
Pozidriv recess
Round head
Raised countersunk head
Cheese
Straight-knurl
Reduced shank
Full thread
Plain washer
Large plain washer
Spring washer
Ex-teeth CSK washers
Ex-teeth washer
ISO 10644-S4-2009
Hexagon socket knurled heads cap screws and plain washer assemblies
ISO 10644-S4-1998