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M24 Tunnel Segment Bolts for Guangzhou Metro Line 4

In 2015, Anyang Railway Equipment Co., Ltd(AT) provided M24 Tunnel Segment Bolts for Guangzhou Metro Line 4.

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Guangzhou Metro Line 4 has a total length of 60.03 km.

In 2015, Anyang Railway Equipment Co., Ltd(AT) provided M24 Tunnel Segment Bolts for Guangzhou Metro Line 4.

The surface of the segment tunnel bolts are treated with hot dip galvanizing. The circumferential bolts and the longitudinal bolts meet “Hexagon head bolts–Full thread” (GB/T5783-2000), the mechanical properties of the ring tunnel bolts are grade 6.8.

  1. The mechanical properties of the nuts are grade 6, the dimensions and technical data meet “Hexagon nuts”(GB/T 6170-2000).
  2. The flat washer are treated with hot dip galvanizing.
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