Open end blind rivets are one of the most commonly used types of rivets. Business owners need to know the basic information about open end blind rivets before making a purchase. This comprehensive guide will give you a good help.
What Is an Open End Blind Rivet?
An open-end blind rivet is a standard fastener. It can be installed from one side, features an open end, and creates a permanent connection by shearing the mandrel.
An open-end blind rivet consists of two parts:
- Rivet Body: Responsible for generating clamping force
- Rivet Mandrel: Forms a locking structure when sheared
(Key feature: The end is open (open-end), not sealed)
Open-end blind rivets are the most basic and commonly used single-sided fasteners in industry, suitable for the vast majority of non-sealed, non-high-strength fastening applications.
What Are the Advantages of Open End Blind Rivets？
The key advantages of open-end blind rivets are: low cost, high efficiency, and the ability to be installed from one side. As a result, riveting is considered the most cost-effective general-purpose fastening solution in industrial assembly.
Core Advantages:
- Blind Installation: The connection can be completed by working from just one side.
- Extremely high installation efficiency: Installation time per rivet: 2–5 seconds
- Lowest Cost: Open-end rivets have the lowest manufacturing cost among all blind rivets.
- Extremely Wide Range of Applications: Suitable for all thin-sheet connections.
- Consistent Installation: The mandrel breakage force is preset.
- No Heat Affected Zone: Causes no thermal deformation and does not damage material coatings or surface treatments.
- Greater Stability in Vibration Environments: Provides a permanent connection.
Types of Open End Blind Rivets
Open-end blind rivets can be classified in two ways.
- Head Type
- Material
I. Classification by Head Type
1️⃣ Dome Head Blind Rivets: The most versatile. The standard head type, accounting for over 80% of applications. Distributes force evenly and is easy to install.
2️⃣ Countersunk Head Blind Rivets: Flush with the material surface after installation. Requires pre-drilling a countersink hole. Suitable for products with high aesthetic requirements.
3️⃣ Large Flange Blind Rivets: Features a larger head and wider contact area. Effectively distributes pressure to prevent material deformation. Suitable for fastening soft materials (plastic, aluminum sheet) and thin sheets.
II. Classification by Material
1️⃣ Aluminum head + aluminum mardrel(Aluminum/Aluminum): Lightest and most affordable, but with lower strength. Primarily used in home appliances and lightweight structures.
2️⃣ Aluminum head + steel shank (Aluminum/Steel): Moderate strength and reasonable cost.
Primarily used in HVAC systems and electrical cabinets. The preferred choice for general industrial applications.
3️⃣ All-Steel (Steel/Steel): High strength, lower cost (compared to stainless steel). Primarily used for equipment connections.
4️⃣ Stainless Steel (A2 / A4): Corrosion-resistant, high strength. Primarily used for outdoor (solar) and humid environments.
Open End vs Closed End Blind Rivets - What is the difference between them?
There is only one fundamental difference between open-end and closed-end blind rivets: whether they are sealed. However, this difference affects corrosion resistance, service life, and application scenarios.
| Feature | Open End Blind Rivet | Closed End Blind Rivet |
|---|---|---|
| Tail Structure | Open (with hole) | Fully sealed |
| Sealing Performance | Not sealed | Waterproof / airtight |
| Strength | Medium | Slightly higher |
| Corrosion Protection | Lower | Better |
| Cost | Low | Higher |
| Typical Use | General fastening | Sealed / outdoor applications |
Open-end blind rivets are the most commonly used type of rivet. They are used in approximately 80% of all applications. They are also the most cost-effective option. Closed-end blind rivets, on the other hand, provide a sealed connection and are used in the remaining 20% of critical applications, such as appliance housings and HVAC ductwork.
How do I choose between open end and closed end blind rivets for my project?
The sole priority criterion for selection is whether “sealing” is required.
- Sealing requirements: If waterproofing, airtightness, or protection against liquid leakage is required, closed-end blind rivets must be selected.
- Operating environment: In outdoor, humid, or corrosive environments, prioritize closed-end rivets made of stainless steel.
- Strength and reliability requirements: Use open-end rivets for moderate strength applications; closed-end rivets provide greater stability for slightly higher reliability requirements.
- Cost sensitivity: Choose open-type for low-cost applications; choose closed-type for high-cost applications.
If your project does not have strict waterproofing requirements and you are working with a limited budget, opt for open-end blind rivets. Otherwise, opt for closed-end blind rivets.
Are aluminum open end blind rivets strong enough for structural applications?
Aluminum open-ended pop rivets are not suitable for structural applications; they are intended only for light-duty or non-structural fastenings.
Why is it “not suitable”?
- The material itself has limited strength: Aluminum is only about 1/4 to 1/6 as strong as steel.
- Open-ended structures compromise strength: The open-ended design reduces shear and tensile strength, resulting in generally poor vibration resistance.
- Not a “structural-grade design”: Aluminum open-ended rivets are standard-grade products, whereas structural applications require structural-grade rivets.
What are open end blind rivets used for in general applications?
Open-end pop rivets are primarily used in lightweight fastening applications that are non-sealing, non-heavy-duty, and require high-efficiency assembly.
The five most common application areas:
- 1. Sheet metal fabrication: Metal plate joining, chassis and cabinet assembly.
- 2. HVAC systems (Heating, Ventilation, and Air Conditioning): Duct connections, ventilation system structures.
- 3. Electrical/Control Cabinets: Enclosure mounting and internal structural connections.
- 4. Home Appliances (White Goods): Washing machine enclosures, air conditioner housings, and refrigerator structural components.
- 5. Automotive Non-Structural Components: Interior trim panels and lightweight brackets.
Open-end pop rivets are one of the most versatile fastening methods in industry, widely used in light-duty assembly applications such as sheet metal fabrication, HVAC, electrical systems, and home appliances.
What happens if I use an open end blind rivet with the wrong grip range?
If the wrong clamping range is selected, the fastener will either fail to grip (if too long) or fail to hold securely (if too short), ultimately leading to connection failure or safety hazards.
There are two types of errors:
- Rivet body too short: The rivet cannot be driven in, or may even pull out completely.
- Rivet body too long: A gap forms between the panels, causing the rivet to loosen.
How do I choose between hand, battery and pneumatic tools for installing open end blind rivets?
Low frequency/maintenance → Manual; Medium volume/on-site application → Electric; High-volume production/factory → Pneumatic (most efficient).
| Tool Type | Power Source | Typical Use | Efficiency | Mobility | Cost Level |
|---|---|---|---|---|---|
| Hand Riveter | Manual | Repair / low volume | Low | Very High | Low |
| Battery Rivet Gun | Lithium battery | Field work / medium volume | Medium-High | High | Medium |
| Pneumatic Rivet Gun | Compressed air | Factory / mass production | Very High | Low | High |
1️⃣ Frequency of use (determines the type of tool)
| Daily Usage | Recommended Tool |
|---|---|
| <100 rivets/day | Hand Riveter |
| 100–1000 rivets/day | Battery Rivet Gun |
| >1000 rivets/day | Pneumatic Rivet Gun |
2️⃣ Work Environment
| Work Environment | Recommended Tool |
|---|---|
| No power / remote site | Hand Riveter |
| Outdoor / mobile work | Battery Rivet Gun |
| Fixed production line | Pneumatic Rivet Gun |
3️⃣ Rivet Specifications
| Rivet Size / Material | Recommended Tool |
|---|---|
| 3.2mm Aluminum | Hand / Battery |
| 4.8mm Steel | Battery / Pneumatic |
| 6.4mm or larger | Pneumatic only |
🔵 IV. Comparison of Efficiency and Labor Costs
| Tool Type | Speed | Labor Fatigue | Consistency | Long-Term Cost |
|---|---|---|---|---|
| Hand | Low | High | Medium | High (labor) |
| Battery | Medium-High | Low | High | Medium |
| Pneumatic | Very High | Very Low | Very High | Lowest (mass production) |
Case Study 1: HVAC Duct Installation (On-Site Construction)
For a central air conditioning project at a large shopping mall, the construction team needed to assemble and secure a large number of galvanized steel ducts on-site. The ducts were approximately 0.8–1.2 mm thick, and 4.0 mm and 4.8 mm open-end pop rivets were used. Each worker needed to install approximately 300 to 600 rivets per day. Work locations were scattered across ceilings, walls, and equipment crawl spaces. The construction environment lacked a stable air supply, and equipment had to be moved frequently.
While manual rivet guns are low-cost, they quickly lead to low efficiency and worker fatigue, resulting in a noticeable drop in installation speed later in the day; If pneumatic rivet guns were used, workers would have to drag air hoses and an air compressor, making them nearly impractical on-site and resulting in even lower efficiency.
Ultimately, an electric (battery-powered) rivet gun was selected, a decision that directly transformed construction efficiency: installation time per rivet dropped from 5–8 seconds to approximately 2–3 seconds, and a single worker’s daily output increased to over 500 rivets. Additionally, since no external equipment was required, on-site mobility improved significantly.
The key lesson from this case is that in any site environment characterized by dispersed work, a lack of compressed air supply, and the need for mobility, an electric rivet gun is virtually the only reasonable choice, as it strikes the optimal balance between efficiency and flexibility.
FAQs
Are open end blind rivets suitable for high‑temperature environments?
They can be used, but it depends on the material. Standard aluminum open-end blind rivets are not suitable for high temperatures, whereas stainless steel or steel rivets can be used in medium-to-high temperature environments.
- Aluminum OpenEnd Blind Rivet: Not suitable for high temperatures. Recommended operating temperature: ≤150°C.
- Steel OpenEnd Blind Rivet: Suitable for medium temperatures. Recommended range: ≤300°C.
- Stainless Steel OpenEnd Blind Rivet: The best choice. A2 (304) remains stable up to approximately 400°C, while A4 (316) offers better corrosion resistance and temperature tolerance.
In high-temperature environments, stainless steel rivets are the preferred choice.
For marine or high‑moisture environments, should I use open end or closed end blind rivets?
In marine/high-humidity environments, Closed End (sealed) + stainless steel is the preferred choice; Open End is only suitable for non-sealed, low-risk applications.
Marine/high-humidity environments present three key challenges:
- Persistent moisture (including penetration)
- Salt fog corrosion (Cl⁻ ions)
- Thermal cycling + alternating wet and dry conditions
These three factors can lead to accelerated corrosion of the rivet, loosening of the joint, and even seal failure.
The open tail of an Open End Blind Rivet creates a passageway when the mandrel breaks. Moisture can enter the interior of the joint, and trapped salt accelerates corrosion, leading to a direct decline in joint strength over time. In contrast, the fully sealed tail of a Closed End Blind Rivet effectively prevents the ingress of water and air, making it the standard choice for marine environments.
Can open end blind rivets be used where water tightness is required?
Standard open-end blind rivets are not suitable for applications requiring a strictly watertight seal. If their use is unavoidable, additional sealing measures are required; however, it is recommended to use closed-end blind rivets instead.
Open-end blind rivets are inherently not watertight. This is due to their design. The tail end of an open-end blind rivet is open; once the mandrel is severed, it leaves an open channel through which water can enter.
Are open end blind rivets suitable for vibration‑prone applications?
It can be used, but only in environments with low levels of vibration; it is not suitable for conditions involving moderate to high levels of vibration or prolonged fatigue.
Open-end blind rivets do not have a closed tail and offer relatively limited clamping force; they are therefore unsuitable for applications involving moderate to high levels of vibration.
Can I use open end blind rivets in automotive body panel repairs?
Open-end blind rivets may be used in automotive body repairs, but only on non-structural, non-safety-critical parts.
Open-end blind rivets have limited shear and tensile strength and do not comply with OEM repair specifications; therefore, they must not be used on structural components or in safety-critical areas.
Are open end blind rivets appropriate for HVAC ductwork and sheet metal?
Open-end blind rivets are ideal for use in HVAC ductwork and general sheet metal joining, provided that: there are no sealing requirements and the environment is not highly corrosive.
Where sealing is required or in highly corrosive environments, we recommend using blind rivets.
When should I choose stainless steel open end blind rivets instead of aluminum?
If high strength, corrosion resistance and durability are required, choose stainless steel; if light weight, low cost and ease of installation are required, choose aluminium.
What material should I choose for open end blind rivets for outdoor use?
For outdoor applications, stainless steel open-end blind rivets should be used, preferably of the 304 or 316 grade.
Stainless steel offers excellent corrosion resistance, high strength and a long service life, making it ideal for outdoor environments.
How many open end blind rivets do I need to carry a given load?
Number of rivets required = total load ÷ permissible load capacity per rivet, multiplied by the safety factor.
It is important to note that one should not rely solely on theoretical strength; one must also take into account the direction of the load, material thickness, hole spacing, edge distances, vibration and safety class in order to determine the exact number of rivets required.
How do I choose open end blind rivets for thin plastics or soft materials?
For thin plastics or soft materials, prioritise wide brims + soft materials (aluminium) + a suitable grip + shims where necessary.
- The wide-brimmed rivet head provides a larger contact area and will not puncture the material.
- The aluminium rivet body does not generate excessive clamping force, so it will not damage soft materials.
- The grip must cover the total thickness exactly; it must not be too long or too short.
- For materials less than 1 mm thick, or made of PP or PE, a washer must be used.
The aim when selecting open-ended pop rivets for thin plastic or soft materials is to ‘avoid damaging the material’.
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Rivmate is one of China’s top three manufacturers of pop rivets. The company is IATF 16949 certified and offers high-strength structural pop rivets that serve as alternatives to Huck and Avdel products.