the
Heavy Duty Bolt
The Heavy Duty Bolt (HD) is a shorter blind fixing which provides improved performance when the shear plane of the materials being fixed falls across the legs of a standard Blind Bolt.
A HD Bolt is the perfect solution when heavy weight steel sections need to be fixed in place. The straightforward activation process requires no specialist equipment, needing just a spanner and hammer to set the unique pin locking mechanism. Thanks to this, the Heavy Duty Bolt can save both time and money during installation.
Advantages of Using The Heavy Duty Bolt:
- Installation is quick and simple
- An oversized hole is not needed
- The Zinc Flake 1000Hr SSP coating offers 1000 hours of salt spray protection
- Increased efficiency for any assembly
- Unique pin locking activation
If you require solutions for a specific project then please contact us using the details given below. We’ll listen and set out just how using Blind Bolts could help you. For detailed information on installation, please view our Heavy Duty Bolt Installation guide, Heavy Duty Bolt Fitting Instructions.
HEAVY DUTY BOLT
Technical Details
NOTE: All dimensions are in mm unless stated otherwise.
The Blind Bolt Company reserve the right to change these technical details without notice.
Heavy Duty Product Specification Zinc Flake 1000Hr SSP | ||||||
| Product Code | Bolt Size | Hole Diameter | Fixing Thickness | Depth Clearance | Corrosion Protection Salt Spray (hours) | |
| Min | Max | |||||
| HD0845ZF | M8 x 45 | 8 | 7 | 25 | 10 | Zinc Flake 1000Hr SSP |
| HD1045ZF | M10 x 45 | 10 | 7 | 25 | 12 | Zinc Flake 1000Hr SSP |
| HD1060ZF | M10 x 60 | 10 | 7 | 40 | 12 | Zinc Flake 1000Hr SSP |
| HD1245ZF | M12 x 45 | 12 | 8 | 22 | 15 | Zinc Flake 1000Hr SSP |
| HD1260ZF | M12 x 60 | 12 | 8 | 34 | 15 | Zinc Flake 1000Hr SSP |
| HD1275ZF | M12 x 75 | 12 | 8 | 48 | 15 | Zinc Flake 1000Hr SSP |
| HD1660ZF | M16 x 60 | 16 | 12 | 30 | 25 | Zinc Flake 1000Hr SSP |
| HD1675ZF | M16 x 75 | 16 | 12 | 45 | 25 | Zinc Flake 1000Hr SSP |
| HD2070ZF | M20 x 70 | 20 | 15 | 32 | 30 | Zinc Flake 1000Hr SSP |
| HD2085ZF | M20 x 85 | 20 | 15 | 47 | 30 | Zinc Flake 1000Hr SSP |
Design Resistance for HD Type Blind Bolts Design to BS EN 1993-1-8 | |||
| Bolt Size | Tensile (kN) | Single Shear (kN) | Recommended Tightening Torque (Nm) |
| M8 | 13.6 | 13.6 | 20 |
| M10 | 31.7 | 21.9 | 35 |
| M12 | 46.6 | 32.2 | 45 |
| M16 | 69.6 | 60.8 | 95 |
| M20 | 88.2 | 95.5 | 120 |
Important Note
The above resistances are equally appropriate for designs to BS 5950
Stainless Steel HD Bolts
Heavy Duty Product Specification | |||||
| Product Code | Bolt Size | Hole Diameter | Fixing Thickness | Depth Clearance | |
| Min | Max | ||||
| HD0845SS | M8 x 45 | 8 | 7 | 25 | 10 |
| HD1045SS | M10 x 45 | 10 | 7 | 25 | 12 |
| HD1060SS | M10 x 60 | 10 | 7 | 40 | 12 |
| HD1245SS | M12 x 45 | 12 | 8 | 22 | 15 |
| HD1260SS | M12 x 60 | 12 | 8 | 37 | 15 |
| HD1660SS | M16 x 60 | 16 | 12 | 30 | 25 |
| HD2070SS | M20 x 70 | 20 | 15 | 32 | 30 |
Design Resistance for HD Type Blind Bolts | |||
| Bolt Size | Tensile (kN) | Shear (kN) | Recommended Tightening Torque (Nm) |
| M8 | 11.0 | 11.5 | 18 |
| M10 | 10.1 | 18.4 | 24 |
| M12 | 25.3 | 27.1 | 30 |
| M16 | 29.4 | 51.1 | 45 |
| M20 | 59.5 | 80.2 | 80 |
Important Note
The above resistances are equally appropriate for designs to BS 5950
HEAVY DUTY BOLT
Testing Terms Explained
The HD Bolt has an innovative and unique design. This means that anyone using them has to be aware of exactly how the dimensions of the bolts are measured, and the way in which these measurements are used during fitting.
The image above shows a pictorial representation of these measurements, while the details are set out below.
If you have further questions on the fixing terms of Blind Bolts please get in touch with us. Use the contact details at the bottom of the page or click here to send us an email.
HEAVY DUTY BOLT
Fitting Instructions
The following videos visually represents the detailed installation of the Heavy Duty Bolt.
HD Bolt Installation Instruction
HD Bolt Installation Instruction (PDF Download)
