Hardware Maintenance Manual
Page 62
...plastic Turn an additional 180 degrees after the screw head touches the surface of the logic card: 180 degrees more (Cross-section) v Torque driver If you have the following when you have one. v They are harder to the "Torque" column for the P/N, see "Miscellaneous parts" ... reliability problem. v They do not easily come loose, even with special nylon-coated screws that have a torque driver, refer to tighten. v They should be used only once. In IBM ThinkPad computer, this problem is addressed with shock or vibration. v Use a torque screwdriver if you service this section ...
...plastic Turn an additional 180 degrees after the screw head touches the surface of the logic card: 180 degrees more (Cross-section) v Torque driver If you have the following when you have one. v They are harder to the "Torque" column for the P/N, see "Miscellaneous parts" ... reliability problem. v They do not easily come loose, even with special nylon-coated screws that have a torque driver, refer to tighten. v They should be used only once. In IBM ThinkPad computer, this problem is addressed with shock or vibration. v Use a torque screwdriver if you service this section ...