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ASTM F1852 F2280 JSS II 09 Twist Off Tension Control Structural Bolts to Russia Factory Related Video:
Here’s a simple and dead easy way to unscrew those deep seated and hard to reach security screws that would otherwise require a special wrench.
Worked great to open up a Karcher pressure washer.
Cutting 1/2-20 threads with my lathe.
Camera is mounted on the tool post.