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上海武田机电有限公司产品详细说明:P&S紧固件,P&S SUPERBOLT TENSIONERS SUPERBOLT Tensioners are designed as direct replacements for hex nuts. These devices can be threaded onto a new or existing bolt, stud, threaded rod or shaft. The main thread serves to position the tensioner on the bolt or stud against the hardened washer and the load bearing surface. Once it is positioned, actual tensioning of the bolt or stud is accomplished with simple hand tools by torquing the jackbolts which encircle the main thread. All SUPERBOLT products utilize this same principle.