Abstract: A coupling for preventing the buildup of static electricity between adjacent conduits includes a sleeve enclosed by pivotally connected semicircular segments. The semicircular segments are in electrical contact with first and second conduits via bonding wires. The semicircular segments, bonding wires, and/or flanges are coated with a hard metallic ductile conductive coating, which is preferably a boron-nickel coating, to provide electrical conductivity between the conduits. The coupling may be entirely coated with the boron-nickel coating, or selectively coated to provide the required electrical conductivity between the conduits. The conduits include flanges mounted on the ends thereof. Each flange is selectively coated with a hard anodized, dry-lube, thin-film non-conductive, or other insulating coating to reduce or prevent arcing on the interior of the coupling under lighting strike or other hazardous electrical conditions.

Abstract: A coupling for preventing the buildup of static electricity between adjacent conduits includes first and second threadably engageable coupling members in electrical contact with the adjacent conduits. The threads are coated with a hard metallic ductile conductive coating which is preferably a boron-nickel coating, to provide electrical conductivity between the coupling members. The coating has a relatively low co-efficient of friction so as to prevent binding of the threads during threading. In one embodiment, a detent spring, which includes one or more resilient detents, is rotatable with one coupling member and engages with a notch or notches on the other coupling member to provide a frictional force against relative rotation between the coupling members as the coupling members threadably engage. The coupling members may be entirely coated with the boron-nickel coating, or selectively coated to provide the required electrical conductivity between the coupling members.