R25N Ground Engineering Tool Self Drilling Anchor Hex Nut The Self Drilling Anchor (SDA) system is a bolting solution for difficult ground and rock conditions. The system enables drilling and grouting in one operation, making much saving in jobsite and project time. Which is comprised of a hollow threaded anchor bar with a sacrificial drill bit that performs drilling, anchoring and grouting in a single operation. Self drilling anchor system is mainly used in slope stabilization, tunneling pre-support, foundations with micro piles etc jobs, which is widely used in mining, tunneling, railway, metro construction etc projects. Characteristic: 1. Applying for both the domed plate and flat plate. 2. All nuts exceed the ultimate strength of the self-drilling anchor bar. 3. It can meet the stringent demands on anchor specification. 4. Hot-dip galvanizing for corrosion protection. Anchor Nut
