Terminal Blocks - Barrier Blocks definition: Terminal blocks are insulated connections that fasten two or more wires together and have an insulating frame and a clamping system. It is a... Terminal Blocks - Barrier Blocks Product Listing: MAT-20,MAT-6.Connectors, Interconnects type:Circular Connectors(4568089),Barrel - Audio Connectors(714841),Rectangular Connectors - Headers, Male Pins(577481),Card Edge Connectors - Edgeboard Connectors(554593),D-Sub Connectors(513416) .Terminal Blocks - Barrier Blocks has 2 pieces of spot stock price information, you can click the "RFQ" button to confirm the inventory and price with the MOST.