Secura Solid Bolts

Secura (solid) Bolt

The Secura Bolt is a solid reinforcing bar for use in strata environments of underground mines.

  • Design includes a unique paddle system to improve resin mixing providing higher bond strength in large diameter boreholes
  • Proven historical performance and extensive quality controlled manufacture
  • Permanent primary support
  • Multiple lengths, diameters, paddle configurations
  • Consistent pin nut torque drive system
  • High strength 'Nova' thread (R thread) profile including a modified rope thread with large root and small crest areas.
  • Proven resin mixing performance
  • High load transfer


Permanent primary support

High Strength thread

Proven resin mixing performance

Mechanical Properties (Typical)

Mechanical Properties R27 R24 R24XHT T20 3/4"
Core Bolt Diameter (mm) 23.5 21.75 21.75 19.5 17.3
Cross Sectional Area–(mm2) 450 370 370 299 242
Yield Strength (MPa) 550 445 650 550 340
Tensile Strength (MPa) 650 730 890 640 490
Tensile Force (MT) 30 27.5 33.6 19.3 12
Elongation (%) 5D 22 22 19 21 27

Mass per metre– Bar (kg/m)

3.4 3.0 3.0 2.4 1.90


Available threads:

  • The unique Nova thread (R thread) incorporates a modified rope thread with large root and small crest areas. The R Thread is a more robust performing thread
  • UNC thread is available with the ¾” size Secura Bolt
  • Continuous T threadbar available with the T20 Secura bolts.


We also manufacture a comprehensive range of specially designed plates for use with rock bolts and cable bolts.

Plates most typically used with strata bolts:

Dome Plate

150x150x10mm (HA300)

Combi Plate


Crown Plate 150x150x5mm



All bolts can be supplied black or hot dip galvanised and are manufactured and supplied from our Sydney facility.

For more information on configurations, dimensions and weights download the technical datasheet or contact Minova.

Industry Sectors

Coal Mining

Hard Rock Mining

Common Uses

Rock Bolting

Roof Control



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More than 130 years

Industry experience and knowledge