... bi-metal (bimetal) rivets, tri-metal (trimetal) contact, button contacts, semi tubular contact rivets and other special contacts. . All of ... customers requirement, especially for Button Contacts, and Tri-metal Contact Rivets, etc. We promise we have superiority over others ... fast delivery, competitive price and high quality.2.Specifications:Special contact rivets1. Head diameter: 2.2-8mm2. Samples or ...