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The 5-Second Trick For types of screw heads

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The threads of the screw would be the ridges that spiral up the shank of the screw, which push it into the fabric when they're turned. The thread can be an external one particular (normally identified as “male”) or https://pr8bookmarks.com/story17548227/indicators-on-types-of-screw-heads-you-should-know

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