Method and means for producing a variable pitch screw
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Method and dies for making a screw
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Thread forming screw
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Threaded furrowing screw
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Method for producing a threaded insert with internal and external thread and threaded insert
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Screw anchor for attaching add-on parts in concrete or masonry
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Screw anchor for fixings in concrete and masonry
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Generation of a systematic residual stress distribution in components by introducing screws or threaded rods with a longitudinally variably changing thread pitch
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Head of a countersunk screw
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Inclined under roof construction has rafter, insulating layer applied on it and counter lathing lies over it, and counter lathing is connected with rafter by screws
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Screw
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Countersunk head screw for fastening e.g. wood, has cylindrical shank, and conical countersunk head with two edges provided at lower side, where edges mark end of partial surfaces lying on lower side
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Anchor plug used for fixings to concrete has threaded external profile and internal threaded bore
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Thread forming screw
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Screw with cutting edge
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Packer to bring injected medium under pressure into cracks or cavities in stone or concrete; has hollow screw forming tube part for medium pressed against seal fitted against shoulder in borehole wall
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Self-tapping screw for anchoring in gas or light concrete component has in front of shaft part with specially configured thread a thread-less spike for driving into component
