Your query is non=conformists. The screws ae apparently 1/4" front to back 1/4 -22 and back 1/4" 20 x 3/4 and 1/4} - 20X1/1/2".

Here are the torque recomehttps:

//www.imperialsupplies.com/pdf/A_FastenerTorqueCharts.pdfdatonsa.