QFP Test Sockets - Clamshell. Clamshell test sockets for QFP's Spring loaded hinged lid latches to retain ICs Easy, repeatable access for test purposes High reliability, durability and temperature range Range supports a variety of pitches Body material Glass Filled PES; Glass Filled PEI Contact material Beryllium Copper Contact plating Gold Insulation Resistance 1000 M (At 500 Vdc) Contact resistance 30m (at 10mA) Operating temperature -55°C to 170°C Durability 10000 insertions