The recommendation for a Glock front sight screw is to use 5-7 in/lbs. (0.565-0.791 N-m) of torque. You can achieve 5 in/lbs. using the Night Fision Hex Screw driver and using hand torque only. (drivers approximately 3’’ length and 3/8 diameter) It is also recommended that you de-grease and apply high strength thread locker to the front sight screw when installing.
These recommendations are based on tests that were done using the torquing devices. DO NOT EXCEED 10in/lbs. (1.13 N-m) of torque or risk of failure is very high. Failure of the screw from over tightening begins after 7 in/lb. (0.791+ N-m).
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