TRY-B Pre-stressed yield bolt
Can embody repeated on the TRY-A characteristics basis by pressure.
Tensile strength interposing the first time according to different bolt by ton, first time by pressure X and second by pressure y ton.
Contruction hardwares
Coil ties assembly
Stretched metal washers assembly with plain finish or hot dipping galvanized finish.
These kinds of bolts are special for mines construction, non standard or in standard.
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