Threads: Each Strut Channel Nut meets U.S. 3/8inch-16 UNC standards and features self-aligning threads and alternating teeth to prevent side slippage under pressure. Electro Zinc Plating Finish: The increased thickness of the sturdy zinc plating provides resistance and guarantees long-lasting brightness even after years of use. These spring-loaded C-channel Spring Channel Nuts wipe clean easily and are reusable. Grade 5 Strength and Durability: Our Strut Channel Spring Nuts are made from Grade 5 higher strength steel and are 8mm thick, providing superior tensile strength compared to traditional 6mm Strut Channel Nuts. Premium Flexible Springs: Long Spring Strut Channel Nuts thicker 1.57-inch (40 mm) springs are used to long-lasting flexibility by retaining their length even after repeated extreme compression. What You Get: 40 Pcs Spring Strut Channel Nuts, strut channel plastic wing nuts compatible with US strut systems. Widely used in photovoltaic power generation, solar panel fixing, communications, seismic support systems, power infrastructure suspension, ceiling track installation, etc., it is an ideal choice for pillar channel steel., Weight: 2.99608214058 Pounds, Manufacturer: Prterver