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Knurled screws and thumb screws, and knurled nuts are designed with a straight metal knurling according to DIN. In a more modern and ergonomic design, these are also available with plastic knurled heads. There are many varieties, with the option of removable thrust pad, loss prevention and quick release designs and materials include plastic, steel and stainless steel. Flat versions are space saving and can be used in small spaces. Knurled screws and nuts are invaluable in most industrial settings.