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| Type | R25 | R27 | R28 | R32 | R38 | R51 |
| O.D.mm | 25 | 27 | 28 | 32 | 38 | 51 |
| Tensile StrengthMPa | ≥650 | ≥650 | ≥650 | ≥650 | ≥650 | ≥650 |
| Tooth Depthmm | 1.5±0.1 | |||||
| Thread Pitchmm | 12.7±0.1 | |||||
| Thread type | Left | |||||
| Standard Length | 2.0 3.0 3.5 4.0 4.5 5 6 | |||||
| Size error | ±1% | |||||
| Max depth | Above 12m | |||||
| Remark | Tensile strength and length can be customized accroding to special requirments | |||||
R38 Self-drilling rock bolts