HomeSpecial FastenersR Thread Self-Drilling Anchor Bolt System
R Thread Self-Drilling Anchor Bolt System
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R Thread Self-Drilling Anchor Bolt System


The R Thread Self-Drilling Anchor Bolt System combines drilling, grouting, and anchoring in a single step, ensuring efficiency and safety. Designed for unstable and complex ground conditions, it prevents borehole collapse and guarantees reliable support. The system includes hollow anchor bars, nuts, plates, couplers, drill bits, and centralizers, with options for cutting and extension. Widely used in tunneling, mining, slope stabilization, and foundation support. R25

Size Range
Diameter As per requirement
Length Customizable / on request
More Details
Drawing Image ×
Technical Specifications
Rock Bolt Specifications


Parameter Units R25 R32 R38 R51
R25N R32N R32/18 R38N R51L R51N
Hollow Bar
Hollow Bar
Outer Diametermm253232385151
Internal Diametermm122018213633
Cross-Sectional Areamm²292363408717776993
Ultimate Tensile LoadkN200280280500550800
Yield LoadkN150230230400450630
Coupler
Coupler
Diametermm364242516363
Lengthmm150145145220140190
Hexagonal Nut
Hex Nut
Key Sizemm414646507575
Lengthmm354545507070
Domed Nut
Hex Nut
Key Sizemm414646527575
Lengthmm40.54545607070
Bearing Plate
Bearing Plate
Dimensionsmm150x150150x150200x200200x200200x200250x250
Thicknessmm8810123040
Hole Diametermm303535416060

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