Expansion Shell Rock Bolt (M20)

Features of Sinorock 2 leaf expansion shell rock bolt:

1. Expansion shell rock bolt include expansion shell anchor head, thread bar, anchor plate and nut.
2. Expansion shell was casting and machined.
3. Expansion shell was used in mining.
4. We can provide 2-PCS expansion shell and 3-PCS expansion shell.

Bar size(mm)  Min. Hole size(mm)  Max. Hole size(mm)
18   33   37
20   34   38
25   34   38
28   34   38
32 36 40
36   43   47
40   44   48
50   59   66.