BS 4174-21-1972
Type A hexagon head tapping screw-Table 20
ASME/ANSI B18.6.4-39-1998
Type A hexagon head self tapping screw-Table 39
ASME/ANSI B18.6.4-39-1998
Type A large hexagon head self tapping screw-Table 39
ASME/ANSI B18.6.4-40-1998
Type A hexagon washer head self tapping screw-Table 40
BS 4174-21-2013
Type A hexagon head tapping screw-Table 20
ASME/ANSI B18.6.3-29-2013
Type A hex head self tapping screw-Table 29
ASME/ANSI B18.6.3-29-2013
Type A slotted hex head self tapping screw-Table 29
ASME/ANSI B18.6.3-29-2013
Type A large hex head self tapping screw-Table 29
ASME/ANSI B18.6.3-29-2013
Type A slotted large hex head self tapping screw-Table 29
ASME/ANSI B18.6.3-30-2013
Type A phillips concave hex head self tapping screw-Table 30
ASME/ANSI B18.6.3-30-2013
Type A phillips concave large hex head self tapping screw-Table 30
ASME/ANSI B18.6.3-31-2013
Type A phillips large hex head self tapping screw-Table 31
ASME/ANSI B18.6.4-40-2005
Type A hexagon washer head self tapping screw-Table 40
ASME/ANSI B18.6.4-39-2005
Type A large hexagon head self tapping screw-Table 39
ASME/ANSI B18.6.4-39-2005
Type A hexagon head self tapping screw-Table 39
GOST 11473-1975
Hexagon head wood screws