Blind Rivet – Open End Countersunk (CSK) Head Technical Datasheet
Product Overview
Open End Countersunk (CSK) Head Blind Rivets provide a permanent fastening solution where access is available from only one side of the assembly. The countersunk head sits flush with the surface after installation, making these rivets suitable for applications requiring a smooth, low-profile finish.
Designed for installation using standard blind rivet tools, these rivets are widely used in sheet metal fabrication, electrical enclosures, HVAC equipment, transportation, furniture, appliances, and architectural products. Various body and mandrel material combinations are available to meet different strength and corrosion resistance requirements.
ITEM CODE: 4012
Standards
| Aluminium / Steel | ISO 15978 |
| Steel / Steel | ISO 15980 |
| St Steel / St Steel | ISO 15984 |
| Aluminium / Aluminium | ISO 15982 |
Equivalent Standard : DIN 7337
Dimensions
| d (nom) | 3.2 | 4 | 4.8 | 6.4 |
| d (max) | 3.28 | 4.08 | 4.88 | 6.48 |
| d (min) | 3.05 | 3.85 | 4.65 | 6.25 |
| dk (max) | 6.7 | 8.4 | 10.1 | 13.4 |
| dk (min) | 5.8 | 6.9 | 8.3 | 11.6 |
| k | 1.3 | 1.7 | 2 | 2.7 |
| dm (max) | 2 | 2.45 | 2.95 | 3.9 |
| p (min) | 25 | 27 | 27 | 27 |
| b | lmax + 4 | lmax + 4 | lmax + 4.5 | lmax + 5.5 |
| Hole diameter | 3.3-3.4 | 4.1-4.2 | 4.9-5 | 6.5-6.6 |
all dimensions in mm
Mechanical Properties
Aluminium Body / Steel Mandrel – ISO 15978
| d | 2.4 | 3.2 | 4 | 4.8 |
| Tensile Strength | 350 N | 700 N | 1200 N | 1700 N |
| Shear Strength | 250 N | 500 N | 850 N | 1200 N |
| Mandel Break Load | 2000 N | 3500 N | 5000 N | 6500 N |
Steel Body / Steel Mandrel – ISO 15980
| d | 2.4 | 3.2 | 4 | 4.8 |
| Tensile Strength | 700 N | 1200 N | 2200 N | 3100 N |
| Shear Strength | 650 N | 1100 N | 1700 N | 2900 N |
| Mandel Break Load | 2000 N | 4000 N | 5800 N | 7500 N |
Stainless Steel Body / Stainless Steel Mandrel – ISO 15984
| d | 2.4 | 3.2 | 4 | 4.8 |
| Tensile Strength | 700 N | 1200 N | 2200 N | 3100 N |
| Shear Strength | 650 N | 1100 N | 1700 N | 2900 N |
| Mandel Break Load | 2000 N | 4000 N | 5800 N | 7500 N |
Aluminium Body / Aluminium Mandrel – ISO 15982
| d | 2.4 | 3.2 | 4 | 4.8 |
| Tensile Strength | 350 N | 670 N | 1020 N | 1420 N |
| Shear Strength | 250 N | 500 N | 850 N | 1160 N |
| Mandel Break Load | 1100 N | 1800 N | 2700 N | 3700 N |
Material Characteristics and Recommended Applications
Open End CSK Head Blind Rivets are available in several material combinations to meet different strength, corrosion resistance, and application requirements.
| Material Combination | Characteristics | Recommended Applications |
|---|---|---|
| Aluminium Body / Steel Mandrel | Lightweight, economical, general-purpose | Sheet metal fabrication, electrical panels, HVAC equipment |
| Steel Body / Steel Mandrel | High strength and durability | Heavy-duty fabrication, machinery, industrial equipment |
| Stainless Steel Body / Stainless Steel Mandrel | Excellent corrosion resistance | Marine, food processing, pharmaceutical, outdoor applications |
| Aluminium Body / Aluminium Mandrel | Lightweight with good corrosion resistance | Aluminium fabrications, signage, lightweight assemblies |
Technical Specifications
| Property | Specification |
| Product Type | Open End Blind Rivet |
| Head Style | Countersunk (CSK) Head |
| Installation | Blind installation using manual, pneumatic or battery rivet tool |
| Available Diameters | 2.4 mm, 3.2 mm, 4.0 mm, 4.8 mm |
| Body Materials | Aluminium, Steel, Stainless Steel |
| Mandrel Materials | Aluminium, Steel, Stainless Steel |
| Hole Preparation | Pre-drilled hole |
| Installation Access | One side only |
| Finish | As per material selection |
| Standards | Manufactured to internationally accepted dimensional standards |
Advantages
Open End CSK Head Blind Rivets are commonly used in:
- Flush finished surface after installation
- Ideal where protruding heads are not acceptable
- Installation from one side only
- Fast installation without access to rear side
- Suitable for thin sheet materials
- Available in multiple material combinations
- Good vibration resistance
- Permanent and maintenance-free fastening
- Compatible with standard blind rivet installation tools
Applications
- Electrical control panels
- Sheet metal enclosures
- Telecom cabinets
- HVAC ducting
- Railway equipment
- Automotive body panels
- Furniture manufacturing
- Appliances
- Signage
- Architectural sheet metal
- General fabrication
Related Products
- Closed End Blind Rivets
- Multi-Grip Blind Rivets
- Monobolt Rivets
- Interlock Rivets
- High Strength Rivets
Frequently Asked Questions
What is a countersunk blind rivet?
A countersunk blind rivet is designed with a tapered head that fits into a countersunk hole, producing a flush finished surface after installation.
When should a countersunk head rivet be used?
It is used when the finished surface must remain flat or when protruding heads could interfere with mating components.
Can countersunk blind rivets be installed from one side?
Yes. Like all blind rivets, installation requires access to only one side of the assembly.
What is Grip Range?
Grip Range refers to the minimum and maximum combined thickness of materials that the rivet is designed to securely fasten.
What tools are required for installation?
Open End CSK Head Blind Rivets can be installed using hand-operated, pneumatic, battery-powered, or hydraulic blind rivet tools.
Are grip ranges available on this page?
Complete grip ranges, dimensions and ordering information are provided in the downloadable technical PDF.
How are blind rivets removed?
Blind rivets are typically removed by drilling through the rivet body using a drill bit matching the rivet diameter.
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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