Looks similar to the h.d. no dent buttons, but these are not for nailing wood! The brittle metal will break if hammered. Instead, they are used with spring washers.
Shank Length 1-1/2″
Size #30

Looks similar to the h.d. no dent buttons, but these are not for nailing wood! The brittle metal will break if hammered. Instead, they are used with spring washers.
Shank Length 1-1/2″
Size #22

#15 round spring washers are used with threaded nail buttons.

Washers only.
#10 rectangular spring washers are used with threaded nail buttons.