Round head
Countersunk head
Raised countersunk head
Cheese
Low cheese head
Raised cheese
Cheese with hole
ASME/ANSI B18.13.1M-1-1998
Metric square socket pan head screws and spring lock washers assemblies-Table 1
ASME/ANSI B18.13.1M-3-1998
Metric square socket pan head screws and internal tooth lock washers assemblies-Table 3
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-4-1998
Metric square socket oval head screws and countersunk serrate lock washer assemblies-Table 4
ASME/ANSI B18.13.1M-5-1998
Metric square socket pan head screws and type H regular conical spring washers assemblies-Table 5
ASME/ANSI B18.13.1M-4-2003
Metric square socket oval head screws and countersunk serrate lock washer assemblies-Table 4
ASME/ANSI B18.13.1M-1-2003
Metric square socket pan head screws and spring lock washers assemblies-Table 1
ASME/ANSI B18.13.1M-3-2003
Metric square socket pan head screws and internal tooth lock washers assemblies-Table 3
ASME/ANSI B18.13.1M-4-2003
Metric square socket flat head screws and countersunk serrate lock washer assemblies-Table 4
ASME/ANSI B18.13.1M-5-2003
Metric square socket pan head screws and type H regular conical spring washers assemblies-Table 5