Киевский Национальний Университет Технологий И Дизайна
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A nut, made mostly in hexagon form, has cylindrical opening with threading inside and support surface that is placed normally with respect to axis of cylindrical opening. The nut additionally has bushing made of friction material, mostly of oil-resistant rubber. Support surface of the nut is made with annular socket placed concentrically with respect to axis of nut, there bushing is placed in such way that its part goes out of boundaries of support surface of the nut.