FIELD: devices for fastening or securing constructional elements.
SUBSTANCE: device comprises cylindrical body provided with outer thread and inner opening for receiving the threaded joining member. The opening is parallel to the main axis and is provided with a functional member having protective thread that is deformed when it is in a contact with the part of the threaded joining member without thread. The device additionally has the surface arranged perpendicular to the main axis at one of the ends of the cylindrical body.
EFFECT: improved structure.
15 cl, 16 dwg
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