Conductive Fasteners (nuts)
Brass or plated brass nuts are used when a fastener is to be used in a conductive position. These conductive fasteners pass current more efficiently than steel. These nuts will be indicated by a ‘BLUE DOT’ marking, and should be kept in their conductive location.
Tightening Fasteners (nuts)
Stainless steel and steel nuts are used to torque or tighten an assembly. These fasteners are in a position where torque is necessary, but not conductivity. These fasteners are less expensive, thereby lowering the cost of the assembly, while increasing the amount of fastening torque allowed.