| 摘要 |
A blind fastener for fastening bodies together comprises a hollow tubular sleeve provided with a head, and a stud passing through the hole through the sleeve. The stud is provided with threads near its front end which engage corresponding threads near the front end of the sleeve. The stud also has threads near its rear end of opposite hand to its threads at the front end, and these rear end threads engage threads formed near the rear end of the sleeve so that the stud cannot be turned within the sleeve by ordinary torquing forces. The formation of the rear threads in the sleeve is done by compressing or swaging the rear part of the shank of the sleeve, causing material of the shank to flow into the rear threads of the stud, thereby forming the corresponding rear threads in the shank.
|
