Butterfly nut, particularly for screw fixture of toilet seat

摘要

The nut thread evolves into the head part-side threaded part in a smooth guide hole with a diameter at least corresponding to the thread outer diameter. The head part comprises two grip vanes (10) on both sides of an axial plane through the thread axis and offering between them a free space (12) enlarged in internal width in relation to the outer diameter of the cylindrical nut thread. The threaded part (9) is slotted as far as a rib connection (14) remaining in the area of the guide hole (11) along the axial plane dividing the grip vanes (10). The threaded part (9) at least in the area of the rib connection (14) is of plastic.