... ,disc contacts, semi tubular rivets, special contact High Quality Tri-Metal Contact Rivets,electrical contact rivets Advantages ... delivery, competitive price and high quality.Specifications of tri-metal contacts:1. Head diameter 2.1mm-9mm2. Shank ... , AgSnO2, AgniMore competitive price, more excellent quality, more considerate service! High Quality Tri-Metal Contact Rivets,electrical contact rivets