Pop rivets are essential fasteners for joining sheet metal, plastic, and composite materials in electrical installations, panel building, and fabrication work. These 4.0mm × 18mm rivets feature a durable steel construction with a mandrel that breaks cleanly when set, creating a secure, permanent joint without access to the back of the workpiece. Ideal for electricians, fabricators, and contractors requiring reliable fastening for enclosures, cable trays, and structural assembly.