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bolt tension value in pounds. Torque shall be measured with the nut in motion. Calculate the value,T(in ft- <br /> lbs),where T=[(the measured tension in pounds)x(the bolt diameter in inches)/48 in/ft). <br /> Table C <br /> Minimum Tension Values for High-Strength <br /> Fastener Assemblies <br /> Bolt Diameter Minimum Tension <br /> inches s <br /> 1/2 12 ` <br /> 5/8 19 <br /> 3/4 28 <br /> 7/8 39 <br /> 1 51 <br /> 11/8 56 <br /> 11/4 71 <br /> 13/8 85 <br /> 11/2 103 <br /> 7. Turn the nut further to increase bolt tension until the rotation listed in Table B is reached. The rotation is <br /> measured from the heavy reference line made on the face plate after the bolt was snug-tight. Record this bolt <br /> tension. <br /> 8. Loosen and remove the nut and examine the threads on both the nut and bolt. <br /> C. Long Bolt Acceptance Criteria: <br /> 1. An assembly shall pass the following requirements to be acceptable: 1)the measured moving torque(Step 6) <br /> shall be less than or equal to the calculated value, T (Step 6), 2) the bolt tension measured in Step 7 shall be <br /> greater than or equal to the applicable turn test tension value listed in Table D, 3) the nut shall be able to be <br /> removed from the bolt without signs of thread stripping or galling after the required rotation in Step 7 has been <br /> achieved, 4) the bolt does not shear from torsion or fail during the test, and 5) the assembly does not seize <br /> before the final rotation in Step 7 is reached. Elongation of the bolt in the threaded region between the bearing <br /> face of the nut and the underside of the bolt head is expected and will not be considered a failure. Both fastener <br /> assemblies tested from one rotational capacity lot shall pass for the rotational capacity lot to be acceptable. <br /> Table D <br /> Turn Test Tension Values <br /> Bolt Diameter Turn Test Tension <br /> inches js <br /> 1/2 14 <br /> 5/8 22 <br /> 3/4 32 <br /> 7/8 45 <br /> 1 59 <br /> 11/8 64 <br /> 11/4 82 <br /> 13/8 98 <br /> 1 1/2 118 <br /> The following equipment, procedure, and acceptance criteria shall be used to perform rotational capacity tests on and <br /> determine acceptance of short bolts. Fasteners are considered to be short bolts when full nut thread engagement cannot be <br /> achieved when installed in a bolt tension measuring device: <br /> A. Short Bolt Test Equipment: ' <br /> 1. Calibrated dial or digital torque wrench. Other suitable tools will be required for performing Steps 7 and 8 of <br /> the Short Bolt Test Procedure. A torque multiplier may be required for large diameter bolts. <br /> 2. Spud wrench or equivalent. <br /> Contract No. 10-OM7104 <br /> 170 <br />