PVC non-metallic conduit clamps can be used with Sch. 40 and Sch. 80 rigid non-metallic conduit (RNC). Clamps allow conduit to expand and contract eliminating the temperature-related bowing and flexing common with conduit. Unlike metallic systems, on-metallic clamps are lighter, can be installed in less time and are easily fabricated on the job. Clamps are nonconductive assuring a safe system. Resistant to sunlight and listed for exposed or outdoor usage, Non-metallic PVC conduit clamps are durable and will not rust or corrode. Used to support rigid non-metallic conduit (RNC) and rigid steel conduit. UV inhibited for use in direct sunlight. Weighing less than metallic systems means more efficient and quicker installation time. UL listed. Some clamp applications require 2 screws, 2 nuts, and 2 washers.