PCI Express RA assy 5.8mm slot 3.1mm pc Connector System: Board-to-Board Number of Positions: 36 Centerline (Pitch): .039 in Centerline (Pitch): 1 mm Termination Post & Tail Length: 3.1 mm Board-to-Board 36 .039" 1 mm | Ampseal Header | .039" | TE Connectivity