Sockets
From apertus wiki
1 Potential Sockets for Sensors
1.1 Zero Insertion Force
1.1.1 mPGA 479
31.75mm x 31.75mm (26 x 26 @ 1.27mm) with a 14 x 14 center cutout and one index pin in the corner.
1.1.2 mPGA 604
38.10mm x 30.48mm (31 x 25 @ 1.27mm) with a 13 x 13 center cutout and two index pins on long bottom.
1.1.3 mPGA 905 / FM1
38.10mm x 38.10mm (31 x 31 @ 1.27mm) with 5 x 7 center cutout, sporadic pairs of pins and corner pins missing.
1.1.4 mPGA 940
38.10mm x 38.10mm (31 x 31 @ 1.27mm) with sporadic pairs of pins and corner pins missing.