The 63994-1 is a loose-piece, low insertion force (LIF) style printed circuit board receptacle. It is constructed from tin-plated brass with a material stock thickness of 0.016 inches. This receptacle is designed to fit a 0.025-inch tab and has an overall length of 0.480 inches. It provides a reliable, solderable connection for components on a PCB, facilitating easy assembly and service in various electronic applications.