The NSI UC-104 Bronze Heavy Duty U-Bolt Clamp is designed to grip 5/8" to 3/4" rods and ground 3/8" IPS pipes in parallel or 90-degree positions with an easily adjusted, durably strong design. The high-copper-content alloy of the clamp provides excellent conductivity and heavy-duty strength, alongside the silicon bronze nuts and lockwashers. Use this U-bolt for demanding applications in harsh environments, including direct burial in earth or concrete. UL Listed 467 for Grounding and Bonding. Stock products you can rely on—stock NSI.