BMI-C Standard Precision Contacts Laird Performance Materials BMI-C Standard Precision Contacts ground, carry current and signals, and interconnect boards and devices. Laird Performance Materials BMI-C Standard Precision Contacts offer various plating options, allowing for maximum electrical current-carrying performance. BMI-C is designed for grounding and energy carrying and includes a version ideal for standoff and support. The series offers gold or tin platings and 0.10mm BeCu material, as well as 0.13mm BeCu and 0.20mm spring steel versions.