| 摘要 |
A bolt (10) with a partially threaded shank has a plurality of locking groov es located on the shank between the thread and its head (11). The bolt (10) is inserted through a component stack and spacing washers and a stepped reactio n washer such that at least half of the locking grooves (13) are left exposed. A deformable frusto-conical locking ring (17) is positioned on a nut (15) havi ng a circular receiving cavity on one end. The nut (15) and locking ring (17) a re positioned on the thread (14) of the bolt (10) and tightened so that the locking ring (17) is deformed from a frusto-conical shape to a substantially flat disc such that its bore diameter is reduced, thereby retaining it withi n one of the locking grooves (13). The outer diameter of the receiving cavity (16) abuts the stepped reaction washer (18).
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