Round head
Countersunk head
Raised countersunk head
Cheese
Low cheese head
Raised cheese
Cheese with hole
Small plain washer
Plain washer
Large plain washer
Spring washer
Ex-teeth serrated washer
Conical spring washers
In-teeth washer
Ex-teeth CSK washers
Ex-teeth washer
Curved spring lock washer
Wave spring washer
ASME/ANSI B18.13.1M-4-1998
Metric square socket flat head screws and countersunk serrate lock washer assemblies-Table 4
ASME/ANSI B18.13.1M-4-2003
Metric square socket flat head screws and countersunk serrate lock washer assemblies-Table 4
