CLS Series inline connectors have a non‑conductive retaining screw which passes through the metal contact and fastens at both ends to the retaining ring, providing maximum resistance to excessive torque loading. Constructed of weatherproof materials, products are UL listed and CSA certified. NEMA 3R and NEMA 4 rated for wet locations. All Marinco CL Series, CLS Series and CLM Series products mate precisely with all other manufacturers' cam products.