Hi-Bolt Structural Blind Rivet (Monobolt® Type) – CSK Head – Technical Datasheet
Product Overview
The Hi-Bolt Structural Blind Rivet – CSK Head is a high-strength, mechanically locked blind fastening system designed for applications requiring superior tensile strength, shear strength, vibration resistance, and permanent mandrel retention. Commonly referred to in the industry as a Monobolt® type structural blind rivet, the Hi-Bolt rivet provides a reliable structural fastening solution where access is available from only one side of the assembly.
The countersunk (CSK) head design allows the rivet to sit flush with the surface of the workpiece after installation, making it ideal for applications requiring a smooth, unobstructed finish. The positive mechanical locking mechanism permanently retains the mandrel after installation, ensuring excellent resistance to vibration, impact, and dynamic loading conditions.
Hi-Bolt structural blind rivets are widely used in transportation, electrical enclosures, construction, renewable energy, heavy equipment, and industrial sheet metal fabrication where both structural performance and flush surface finish are required.
Disclaimer: The term Monobolt® is a registered trademark of its respective owner and is used here solely as an industry-recognized reference to describe a category of structural blind rivets. Horizon Inc. supplies equivalent structural blind rivets unless otherwise specified.
ITEM CODE: 4021
Standards
| Manufacturer Standard – Structural Blind Rivet |
Dimensions
| d (nom) | 4.8 | 6.4 |
| d (max) | 4.88 | 6.48 |
| d (min) | 4.65 | 6.25 |
| dk (max) | 8.3 | 10.1 |
| k (max) | 2.2 | 2.4 |
| dm (max) | 3.1 | 4.1 |
| p (min) | 27 | 27 |
| Hole diameter | 4.9-5.1 | 6.7-7.0 |
all dimensions in mm
Mechanical Properties
Steel Body / Steel Mandrel
| d | 4.8 | 6.4 |
| Tensile Strength – (Min) | 4100 N | 8200 N |
| Shear Strength – (Min) | 5800 N | 10500 N |
Stainless Steel Body / Stainless Steel Mandrel
| d | 4.8 | 6.4 |
| Tensile Strength – (Min) | 4100 N | 8200 N |
| Shear Strength – (Min) | 5800 N | 10500 N |
The mechanical values shown are nominal minimum values intended for design guidance only and do not constitute a guarantee of performance in a specific application. Users should validate suitability through application-specific testing.
Material Characteristics and Recommended Applications
| Material Combination | Characteristics | Typical Applications |
|---|---|---|
| Steel Body / Steel Mandrel | High tensile strength, economical | Sheet metal fabrication, electrical panels, HVAC, enclosures |
| Stainless Steel Body / Stainless Steel Mandrel | Excellent corrosion resistance, high strength | Outdoor equipment, transportation, marine, food processing, infrastructure |
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Series | Hi-Bolt |
| Product Type | Structural Blind Rivet |
| Industry Reference | Monobolt® Type |
| Head Style | Countersunk (CSK) Head |
| Installation Method | Blind Side Installation |
| Locking System | Positive Mechanical Lock |
| Mandrel Retention | Permanent |
| Standard Diameters | 4.8 mm, 6.4 mm |
| Body Materials | Steel, Stainless Steel |
| Mandrel Materials | Steel, Stainless Steel |
| Installation Tool | Structural Blind Rivet Tool |
| Surface Finish | Flush Installation |
| Tensile Strength | High |
| Shear Strength | High |
| Vibration Resistance | Excellent |
| Shock Resistance | Excellent |
| Tamper Resistance | Excellent |
| Corrosion Resistance | Material dependent |
| Service Life | Long-term |
Applications
Hi-Bolt Structural Blind Rivets are commonly used in:
- Electrical control panels and enclosures
- Telecommunications cabinets
- Data center infrastructure
- Bus and commercial vehicle body building
- Railway and metro equipment
- Automotive components
- Solar mounting structures
- Renewable energy equipment
- Construction equipment
- Agricultural machinery
- Industrial machinery
- Sheet metal fabrication
- Outdoor structures and signage
- HVAC equipment
- Marine applications
- Defense support equipment
Advantages
- High tensile and shear strength
- Positive mechanical mandrel locking
- Permanent mandrel retention
- Excellent vibration resistance
- High resistance to dynamic loading
- Fast installation from one side only
- Tamper-resistant fastening
- Consistent clamp force
- Long service life
- Suitable for structural applications
- Available in multiple material combinations
- Suitable for joining dissimilar materials
- Excellent performance in industrial environments
Related Products
- Open End Blind Rivets
- Closed End Blind Rivets
- Multi-Grip Blind Rivets
- Monobolt Rivets
- Interlock Rivets
- High Strength Rivets
Frequently Asked Questions
What is a Hi-Bolt Structural Blind Rivet?
The Hi-Bolt Structural Blind Rivet is a mechanically locked structural blind fastener designed for high-strength applications requiring permanent mandrel retention and excellent vibration resistance.
Is Hi-Bolt equivalent to a Monobolt® type rivet?
Yes. Hi-Bolt rivets are designed as Monobolt® type structural blind rivets and provide similar functional characteristics, including mechanical locking and retained mandrels.
Why is the mandrel retained after installation?
The retained mandrel improves tensile and shear strength while preventing loose mandrel fragments within the assembly.
Are Hi-Bolt rivets stronger than standard blind rivets?
Yes. Structural blind rivets provide significantly greater tensile and shear strength compared to conventional open-end blind rivets.
Are Hi-Bolt rivets suitable for vibration-prone applications?
Yes. The positive mechanical locking system provides excellent resistance to vibration, shock, and dynamic loading.
Are Hi-Bolt rivets watertight?
Standard Hi-Bolt rivets provide good sealing performance but are not guaranteed to be fully watertight. Additional sealing methods should be considered where complete sealing is required.
Can Hi-Bolt rivets be installed from one side?
Yes. Hi-Bolt rivets are blind fasteners and require access from only one side of the assembly.
What installation tools are required?
Hi-Bolt structural rivets require pneumatic, hydraulic, or battery-operated installation tools designed specifically for structural blind rivets.
Why choose a CSK head rivet?
CSK head rivets provide a flush surface finish, making them suitable for applications where protruding fastener heads are undesirable.
Technical Disclaimer
The technical information, specifications, dimensions, mechanical properties, drawings, and performance data provided on this website are intended for general reference and engineering guidance only. Values shown are representative of products manufactured under normal production conditions and may vary depending on material grade, manufacturing tolerances, installation method, application, and operating environment.
While Horizon Inc. makes every reasonable effort to ensure the accuracy of the information provided, we make no warranties, express or implied, regarding its completeness, accuracy, or suitability for any particular purpose. Customers are responsible for verifying that the selected product is appropriate for their specific application and operating conditions. Where safety, structural integrity, or regulatory compliance is critical, independent engineering evaluation and product testing should be performed.
Horizon Inc. reserves the right to modify product specifications, dimensions, materials, and technical data without prior notice.
To the fullest extent permitted by applicable law, Horizon Inc. shall not be liable for any direct, indirect, incidental, consequential, or special damages arising from the use of, or reliance upon, the information contained on this website.
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