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GB841008A
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Improvements in methods of making tools and to extrusion dies for use therein
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ES241284A1
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An extrusion matrix device to build tool tools (Machine-translation by Google Translate, not legally binding)
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US2948056A
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Drive link screws
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US2912886A
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Extruding apparatus
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GB794462A
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Improvements in and relating to screw drivers
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ES227333A1
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Improvements introduced in the manufacture of screws. (Machine-translation by Google Translate, not legally binding)
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GB775608A
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Improvements in and relating to self-locking screw-threaded fastening elements
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US2847894A
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Socketed screw head with uniformly offset grooves
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US2854867A
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Method of making header dies
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GB757763A
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Improved self-locking screw
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GB763372A
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Improvements in or relating to header dies
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US2797595A
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Method of hobbing recess-forming punches
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US2832391A
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Nylon lock nut with split metal core to provide frictional and resilient locking action
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US2826940A
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Method of piercing type for hobbing punches
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GB751230A
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Improved method and apparatus for making fastening devices and fastening devices so produced
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US2699693A
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Matrix and method of making same
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US2843862A
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Header die with concavity in wall portion of aperture for holding upset blank therein
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GB697021A
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Torque thrust control device for power screw-drivers and the like
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US2683511A
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Torque thrust control device
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US2562516A
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Threaded fastener
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