previous section: 5/8 page: 5/6 next

5Drilling and tapping

Measuring for screw length

Measure for screw length

Use a depth gauge to measure for screw length.

Measure the longer side of an oblique drill hole, as shown, to ensure sufficient screw length.

A screw should protrude 1-2 mm through the opposite cortex to ensure thread purchase. However, too long a screw may be tender, or injure soft tissues.