TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM9-2350-311-20-1 F-1 TORQUE LIMITS Table F-1 lists wet torque limits. Wet torque limits are used on screws that have high-pressure lubricants applied to threads. F-2 HOW TO USE TORQUE TABLE 1 Measure diameter of screw you are installing. 2 Count number of threads per in. or use a pitch gage. 3 Under heading ‘SIZE”, look down left column until you find diameter of screw being installed (there will usually be two lines beginning with same size). 4 In second column under “SIZE”, find number of threads per in. that matches number of threads counted in step 2. 5 To find grade of screw being installed, match markings on head to correct picture of cap screw head markings in torque table. 6 Look down column under picture found in step 5 until you find torque limit in Ib-ft or N·m for diameter and threads per in. of screw being installed. NOTE Manufacturer’s cap screw head marking may vary. These are all SAE grade 5 (3 line). F-2