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IE18941L
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Manufacture of screws
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IE18602L
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Manufacture of screws
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IE19179L
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Manufacture of screws
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GB662641A
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Improvements in or relating to screws and their method of manufacture
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GB646084A
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An improved method and apparatus for making screws
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GB674222A
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An improved method and apparatus for making screws
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GB626936A
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Improvements in methods of and apparatus for rolling screws
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Apparatus for rolling screws
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Method of making diamond headed screw blanks for double threaded screws and header dies for use therewith
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Header die for use in making screw blanks for double threaded screws
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US2314391A
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Screw and its method of manufacture
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US2314390A
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Method and apparatus for rolling screws
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CA444973A
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Method of making diamond headed screw blanks for double threaded screws
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CA477665A
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Apparatus for rolling double threaded screws
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CA428705A
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Screw manufacture
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CA428706A
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Screw rolling apparatus
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CA444974A
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Header die for making screw blanks for double threaded screws
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