A nut has a body with multi-facet inner surface and inner layer with threading with depth smaller than thickness of the inner layer. At that the inner layer is made of material with melting temperature smaller than temperature of melting of body material. Surface of contact of the nut body with inner layer has shape differing from the revolution surface.
申请公布号
UA28582(U)
申请公布日期
2007.12.10
申请号
UA20070009970U
申请日期
2007.09.06
申请人
"KYIV POLYTECHNICAL INSTITUTE", NATIONAL TECHNICAL UNIVERISTY OF UKRAINE