| 摘要 |
A fastener head with washer gripping has an end head with a hexagon seat for a nut or bolt head, on the outer surface of which a collet with internal projections on the blades forming a cylindrical hole is rigidly fitted. It has an additional movable collet located between the head and rigidly secured collet mounted on the head, spring-loaded towards the seat for nuts with internal protrusions on the blades, which form a hole for gripping washers and have a toothed notch on the inner side. The blades are spaced in the front head and made with possibility of movement close thereto. From the outside, on the blades of movable collet conical-cylindrical projections are placed, on whose upper part of which the internal protrusions of blades of a rigidly fixed collet rest, the last are adapted to move on the conical-cylindrical protrusions, the thickness of internal protrusions of the movable collet is equal to or less than the thickness of gripped washers and an elastic tube is fixed on the collet rigidly fixed with interference. |
