2-5177986-1 is a 40-position fine pitch SMT stacking plug connector designed for parallel board-to-board interconnection applications. This connector features a 0.8mm contact pitch with 8µ" gold plating for reliable electrical contact. Key dimensions include A: 15.20mm (.598"), B: 21.80mm (.858"), and C: 20.20mm (.795"), with a stacking height of 7mm [.276"]. The connector is designed for surface mount technology (SMT) assembly and is supplied in tape and reel packaging for automated pick-and-place operations. It is ideal for high-density electronic applications requiring compact, reliable board-to-board connections.