a. Measure the diameter of the screw to be installed.
b. Count the number of threads per inch or use a pitch gage.
c. Under the heading "SIZE" in Table 5, look down the left-hand column until the diameter of
screw to be installed is found (there will usually be two lines beginning with the same size).
d. In the second column under "SIZE", find the number of threads per inch that matches the
number of threads counted in step 2.
e. To find the grade of the screw that is to be installed, match the markings on the head to the
correct picture of CAPSCREW HEAD MARKINGS on the table. Manufacturer's marks may vary.
These are all SAE Grade No. 5 (3 lines).
Look down the column under the picture found in step 5 until the torque limit in foot-pounds for
the diameter and threads per inch of the screw being installed is found.