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Old June 21, 2012, 11:06 AM   #26
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The torque stretches the screw and put proper tension on the head to keap it from slipping and thus loosening.
And there are probably far more applications that cannot tolerate locking torque than ones that can.

There are also applications that using locking torque is simply inadequate for the environment.
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Old June 21, 2012, 12:21 PM   #27
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The only place I use Loctite (blue) on weapons are scope mounts, scope rings, and action screws torqued to the proper values.
And the rear sight elevation screw of the Beretta NEOS.
597 VTR, because there's so many cans and so little time!
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Old July 26, 2012, 02:41 PM   #28
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For scope base screws I lubricate, torque to spec, loosen, torque to spec again, remove screws, degrease, blue Loctite and finally torque to spec. Best of both worlds.
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Old July 26, 2012, 04:14 PM   #29
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Threads don't lock that way, anyhow. There are many clearance variations between the male and female minor/major diameters of the fastener and the threaded hole. The thin leading taper edge of the male thread contacts only a portion of the insert thread wall. That leaves the head of the fastener and the spacer or cap washer holding most of the torque anyway. Then, here comes your Loctite...

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