TM-9-2350-311-34-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311-34-1 E-1 TORQUE LIMITS Table E-1 lists wet torque limits. Wet torque limits are used on screws with high-pressure lubricants applied to threads. E-2 HOW TO USE TORQUE TABLE 1 2 3 4 5 6 Measure diameter of screw you are installing. Count number of threads per in. or use a pitch gage. Under heading “SIZE", look down "DIA IN.” column until you find diameter of screw being installed (there will usually be two lines beginning with same size). Use “THREADS PER IN.” column under “SIZE” heading to find number of threads per in. that matches number of threads counted in step 2. To find grade of screw you are installing, “SAE CAP SCREW HEAD MARKING” row to match markings on head to correct picture on torque table. 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 you are installing. NOTE Manufacturer’s cap screw head marking may vary. These are all Society of Automotive Engineers (SAE) grade 5 (3 line). E-2