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Oak wood screw of a large antique German grape-press
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If I recall correctly, this screw was about 6 in. in diameter. The thread profile appears to be round about 100 degrees.
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DSC01839.JPG
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Galootaclaus_pic_2.jpg
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IMG_2730s.JPG
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Ramped_Shooting_Board_-_Dedicated_No__6C_plane.JPG
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Chest_SawB.jpg
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