| 摘要 |
1,251,725. Threaded fasteners. HI-SHEAR CORP. 20 March, 1969 [26 March, 1968], No. 14607/69. Heading F2H. A nut 10 provided with a counterbore 27 of uniform diameter, in axial alignment with a threaded bore 25 is provided with a sealing ring 30 which protrudes from the counterbore 27 and which has an inner diameter greater than the maximum diameter of the thread. The nut 10 which may have a driver engageable head 15 adapted to break at a reduced diameter portion 21 from the rest of the nut when a predetermined torque is applied thereto is arranged, in use, to so co-operate with a bolt (35) (Fig. 3, not shown) which passes through a hole in a workpiece (42) that the protruding portion of the sealing ring is deformed into sealing engagement with the portion of the bolt adjacent to the threaded portion thereof. The bolt may be provided with a tool engageable recess (40) at the end of the threaded portion and the sealing ring which may be of synthetic elastomeric material may be secured by adhesive to the counterbore 27. |
