Socket (included) part number: 8452-21B1-RK-TP.
PLCC-52 (19 x 19 mm body, 50 mils / 1.27 mm pin pitch) to PGA-52 Pin 1 In (0.1" pin pitch) adapter.
PCB dimensions: 900 mils x 900 mils (22.86 x 22.86 mm).
PCB construction: FR-4 UL94V-0. PCB operating temperature range: -40C to +130C. PCB reflow maximum temperature: +260C. PCB Assembly standard: IPC-A-610 Class II.
Compact Adapter Series Continuous Current Rating: 0.6A at 10C Temperature Rise, 1.1A at 40C Temperature Rise.
Bottom side machine pins come pre-installed. They are gold plated (1um gold over 50um nickel) 0.46mm diameter, 3mm long. Pins are installed using surface mount with partial through hole technology for excellent strength and positional accuracy.