Insulated Bridle Ring 2″, Zinc Plated Steel
https://testing.nsiindustries.com/product/insulated-bridle-ring-2-zinc-plated-steel/
Bridgeport’s Insulated Steel Bridle Rings are a cost-effective solution for supporting voice, data or video cabling. Open loop end allows easy insertion of cabling. Machine thread style for use with beam clamps or other clamping devices.