Rubber nut with brass thread insert (flanged rubber sleeve with captive brass nut) Key benefits Electrical insulation: the rubber sleeve isolates the brass insert from surrounding metal, preventing shorts and protecting sensitive electronics. Vibration resistance and secure fastening: the elastic sleeve grips the hole and tightens around the brass insert when a screw is driven, reducing loosening from vibration. Simplified installation: the captive brass nut removes the need for a separate nut, speeding assembly and reducing dropped hardware. What it is Construction: flanged rubber sleeve molded around a captive brass threaded insert. Materials: resilient rubber sleeve and internal brass thread insert. Function: the sleeve expands and clamps into the mounting hole as a screw is tightened, locking the brass insert in place and providing an insulated, durable threaded connection. Performance and compatibility Provides strong mechanical hold with insulating properties; suitable where electrical isolation and resistance to loosening are required. Compatible with screws that match the internal brass thread; select the correct screw size to match the insert's thread. Flanged design ensures consistent seating and prevents the sleeve from pulling through the mounting hole. Typical applications Electronics enclosures and PCBs: mount panels or components without creating conductive paths between fastener and chassis. Automotive and transportation: secure trim, brackets, or sensors where vibration resistance and insulation are required. Appliances, HVAC, and industrial equipment: fasten metal or plastic panels while isolating electrical connections and dampening vibration. How to use 1. Insert the flanged rubber sleeve into the mounting hole so the flange sits flush. 2. Insert a matching screw into the captive brass insert. 3. Tighten the screw. As it is tightened, the rubber sleeve expands and clamps into the hole, engaging the brass threads and creating a secure, insulated fastening. Benefits at a glance Combines a durable brass thread with a flexible rubber sleeve for mixed mechanical and electrical performance. Faster assembly with captive nut design and onepiece installation. Reduces vibrationrelated loosening and provides electrical isolation where needed.