Watertight Bulb Tite Rivets
Rivmate Watertight Bulb Tite Rivets Supplier – Provide Security For Your Project With Bulb Tite Rivets
Open End Blind Rivets for Bulk Industrial Use
| Material | Aluminum |
| Surface | Natural Polish |
| Washer | EPDM |
| Head Type | Dome Head,Large Flange |
| Size | 5.2×17.5-5.2×31.8/6.4×20.2-6.4×29.7/7.5×28-7.5×37 |
| Grip Range | 1.3-19.1 |
| Custom | Yes |
Bulbtight Trifirm Rivet is a high-performance blind rivet combining Bulb Tite (bulb-expansion) and Tri-Firm (multi-point support) structures, primarily used for secure connections in brittle or soft materials. Its design prioritizes enhanced joint stability and substrate protection over ultimate strength.
During installation, the rivet’s tail forms a bulbous, large-area expansion structure while distributing stress through multi-point support. The expanded back support diameter typically reaches 2.5–3 times the rivet diameter, reducing localized contact stress by approximately 30–40%. This effectively minimizes the risk of tear propagation in plastics, fiberglass, and composite materials.
Key Advantages of Bulb Tite Rivets
- Bulb-type Backward Expansion Structure: Creates extensive rear support within thin-walled or soft materials, enhancing connection security.
- Superior Hole-Filling Capability: Effectively accommodates assembly conditions with significant hole tolerance variations, reducing assembly failure risks.
- Excellent Gap Compensation Performance: Offers greater adaptability to unstable assembly thicknesses or gap-prone conditions.
- Superior Sealing Performance: The expanded structure achieves full contact with hole walls, meeting moisture resistance or light waterproofing requirements.
- Broad Application Adaptability: Suitable for home appliance housings, HVAC systems, automotive interiors, and outdoor equipment, particularly ideal for blind riveting in soft or brittle materials.
Standard Options for Bulbtight Trifirm Rivets
Wide Application Compatibility
Designed to suit a broad range of Bulbtight Trifirm Rivet applications, this configuration balances assembly stability with effective material protection. The controlled expansion behavior ensures reliable fastening in thin, soft, or brittle substrates while reducing the risk of material deformation or pull-through, making it suitable for multi-material and tolerance-sensitive assemblies.
Head Type Options
Two head styles are available to meet different design and performance requirements. Dome Head provides a clean, low-profile appearance and is suitable for general assembly where standard load distribution and visual consistency are required. Large Flange offers an enlarged bearing surface, which reduces surface pressure on the top material and is especially beneficial when fastening soft, thin, or brittle materials that require additional load spreading.
Material Options
Available in 5.2 mm, 6.4 mm, and 7.5 mm aluminum, these rivets combine lightweight properties with good corrosion resistance. Aluminum construction supports ease of installation and compatibility with non-metallic materials. Larger diameters provide increased shear and tensile capacity, allowing selection based on specific load and application requirements.
Surface Finish
The Natural Polish surface finish reduces burrs and surface imperfections generated during forming. This improves installation consistency, minimizes the risk of damage to mating materials, and helps reduce potential corrosion initiation points. The result is improved assembly quality, stable long-term performance, and a clean, uniform appearance suitable for visible applications.
The Technical Parametersof Watertight Bulb Tite Rivets
| Size | Hole Dia | Grip Range | Tensile ref. | Shear ref. |
| 5.2×17.5 | 5.3-5.5 | 1.3-4.8 | 1800N | 2700N |
| 5.2×19.1 | 1.6-6.4 | |||
| 5.2×22.2 | 4.7-9.5 | |||
| 5.2×25.4 | 7.9-12.7 | |||
| 5.2×28.6 | 11.1-15.9 | |||
| 5.2×31.8 | 14.3-19.1 | |||
| 6.4×20.2 | 6.4-6.6 | 1.6-6.4 | 2500N | 3780N |
| 6.4×23.4 | 3.2-9.5 | |||
| 6.4×26.5 | 6.4-12.7 | |||
| 6.4×29.7 | 9.5-15.9 | |||
| 7.5×28 | 7.8-8.2 | 1.1-9.5 | 4400N | 5600N |
| 7.5×34 | 6.4-15.9 | |||
| 7.5×37 | 9.5-19.1 |
Watertight Bulb Tite Rivets for Secure and Sealed Blind Fastening
Watertight Bulb Tite Rivets are blind rivet fasteners specifically engineered for high-seal connections, forming strong, reliably sealed structures between dissimilar materials. Their bulb-shaped heads feature spherical protrusions that simultaneously fill the hole walls as the bulb-shaped tails expand during installation, creating an effective sealing barrier at the joint.
Thanks to the bulb-shaped expansion and thorough hole-filling effect, Watertight Bulb Tite Rivets significantly enhance moisture and water resistance while delivering a smoother, more aesthetically pleasing finish after installation. This characteristic makes them suitable not only for functional requirements but also for applications demanding visual appeal.
Regarding structural adaptability, these rivets perform reliably when joining thicker panels or dissimilar materials, particularly excelling in metal-to-plastic and metal-to-deformable material connections. Their excellent gap compensation and sealing capabilities ensure dependable performance even under complex assembly conditions.
Leveraging their superior sealing and waterproofing capabilities, Watertight Bulb Tite Blind Rivets are widely adopted across truck manufacturing, building structures, and aerospace industries, establishing themselves as the preferred solution for scenarios demanding high connection reliability and environmental protection.
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Why Choose us as Bulb Tite Rivets Supplier?
OEM & Custom Manufacturing
Rivmate accepts OEM processing and custom blind rivet fastener production. Clients may directly provide drawings or technical specifications. Our engineering team will participate in evaluations and offer manufacturability recommendations to ensure product performance, structure, and assembly requirements are highly compatible. This applies to various products including Bulb Tite Rivets, Blind Rivets, and Rivet Nuts.
In-House Production Facility
We operate our own manufacturing plant covering critical processes including cold heading, forming, surface treatment, and inspection. Partners and customers are welcome to visit our facility for face-to-face technical discussions and project reviews, enhancing collaboration efficiency and transparency.
Quality-First Manufacturing
Rivmate consistently prioritizes product quality and customer service. From raw material selection and process control to final inspection, we strictly enforce internal quality standards to ensure the stability and consistency of every batch of Bulb Tite Rivets.
IATF 16949 & ISO Certified
The company holds IATF 16949:2016 and ISO Quality Management System certifications. Our production processes comply with international standards for the automotive and industrial fastener industries, meeting stringent requirements for quality consistency and traceability.
Exporting to 50+ Countries
Rivmate’s fastener products are exported to over 50 countries and regions, serving as a long-term solution for numerous international distributors and end-users. We maintain stable, ongoing partnerships with global clients, establishing a strong market reputation.
Long-Term Partnership Focus
We go beyond supplying Bulb Tite Rivets—prioritizing the development of enduring partnerships. Through reliable delivery, technical support, and ongoing communication, we help clients succeed in their respective markets, achieving mutual success.
One-Stop Blind Rivet Solutions
Beyond Bulb Tite Rivets, Rivmate offers customized Blind Rivets, Rivet Nuts, and related fastening solutions for your projects. This reduces multi-supplier management costs and enhances overall assembly efficiency.
Typical Applications of Watertight Bulb Tite Rivets
1️⃣ Truck & Commercial Vehicles
In truck and commercial vehicle manufacturing, Watertight Bulb Tite Rivets are commonly used for connecting body panels, cargo compartment structures, and interior components. Their bulb-shaped expansion design provides stable clamping force in thin sheets and dissimilar materials while effectively preventing rainwater and mud from entering the structure. This meets the waterproofing and durability requirements for vehicles operating outdoors under long-term conditions.
2️⃣ Construction & Structural Components
For building and structural applications, these rivets are suitable for curtain wall systems, light steel structures, and prefabricated components. Their excellent hole-filling capability and sealing performance help reduce water ingress risks and enhance long-term joint stability, making them particularly ideal for building joints requiring environmental protection.
3️⃣ HVAC Systems
Watertight Bulb Tite Rivets are widely used in HVAC systems for ductwork, enclosures, and support structures. Given that HVAC equipment operates in environments subject to frequent temperature fluctuations and high humidity, the rivets’ moisture resistance and sealing properties are critical. This rivet type effectively reduces the risk of condensation leakage.
4️⃣ Outdoor Equipment
In outdoor equipment applications—such as communication enclosures, control cabinets, and outdoor housings—waterproofing directly impacts equipment reliability. Watertight Bulb Tite Rivets achieve stable sealing structures by fully conforming to hole walls, significantly enhancing protection ratings against rain and humid environments.
5️⃣ Aerospace & Aviation Components
In aerospace and related equipment, these rivets are commonly used in non-load-bearing structural components and interior assemblies. Their advantages include lightweight construction, high installation consistency, and the ability to achieve reliable sealing in confined spaces, meeting the aviation industry’s stringent requirements for assembly quality and reliability (specific applications require evaluation against project standards).
6️⃣ Industrial Enclosures & Control Panels
Electrical enclosures and control panels in industrial equipment demand high levels of dust and moisture resistance. Watertight Bulb Tite Rivets create stable sealed connections between thin sheet metals and non-metallic materials, helping protect internal electronic components and enhancing overall operational safety and service life.
FAQs - Watertight Bulb Tite Rivets
Q1. What Are Watertight Bulb Tite Rivets?
Watertight Bulb Tite Rivets are a type of waterproof bulb-expanding rivet specifically designed for blind rivet connections requiring sealing performance. During installation, they form a bulb-shaped back-expansion structure while simultaneously filling the hole walls, creating a stable seal in the connection area that significantly enhances waterproofing and moisture resistance.
Q2. How Do Watertight Bulb Tite Rivets Achieve Sealing?
These rivets achieve full contact with the hole walls through their bulb-shaped expansion structure and the sealing design of the rivet head. Once installed, the rivet effectively prevents moisture and humidity from entering the structure through the connection hole, making it a common solution for waterproof structural connections.
Q3. Which Materials Can Be Joined with Watertight Bulb Tite Rivets?
Watertight Bulb Tite Rivets are suitable for joining diverse material combinations, including metal-to-plastic, metal-to-deformable materials, and panels of varying thicknesses. Their excellent hole-filling and gap-compensation capabilities ensure stable performance even in dissimilar material connections.
Q4. Are Watertight Bulb Tite Rivets Suitable for Thick Panels?
Yes, these rivets deliver reliable performance when joining thicker panels. The bulb-shaped back expansion structure provides ample backing support, enhancing joint strength while maintaining effective sealing. This makes them suitable for complex assembly conditions.
Q5. Where Are Watertight Bulb Tite Rivets Commonly Used?
With their superior sealing and waterproofing capabilities, Watertight Bulb Tite Rivets are widely employed in truck manufacturing, construction engineering, HVAC systems, and aerospace industries. They are particularly suited for applications demanding high connection reliability and environmental protection.
