... /16,40/16S,40/20,52/26 DingRun High Quality Self-drilling Anchor Bolt R51N1)Business Type: Manufacture and sale2)The ... inner diameter from 10mm to 120mm, of thickness from 0.5mm to 18mm, of the precision ±0.03mm, and of inner ... profiles. They are widely adept in auto, hydraulic machinery, gas spring system, shock absorbers, precision instruments, anchoring machinery and construction machinery ...