F16B 39/023
Locking of screws, bolts or nuts in which the locking takes place after screwing down {by driving a conic or wedge-shaped expander through the threaded element}
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Edits on 5 Mar, 2022
Golden AI
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F16B 39/023
Locking of screws, bolts or nuts in which the locking takes place after screwing down {by driving a conic or wedge-shaped expander through the threaded element}
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