UNC Standard Top Beam Clamp – Fits 3/8"-16 threaded rods (not metric), with a 3/4" max jaw opening and 500 lbs load capacity. Perfect for clamping onto beam flange to anchor vertical threaded rod. Heavy-Duty & Anti-Corrosion – Made of high-quality ductile iron with a protective coating, ensuring long-lasting durability and resistance to rust. Versatile Top Beam Clamps – Designed to clamp onto steel I-beams, anchoring vertical threaded rods for piping, electrical conduits, and HVAC systems. Labor-Saving Design – No drilling required; allows vertical rod adjustment for quick and flexible installations in various applications. Convenient 12-Pack – Includes 12PCS heavy-duty 3/8" beam clamps , ideal for contractors and DIYers needing reliable support for tubing and rods.