Sealed Blind Rivet
FLOK supplies sealed blind rivets in various sizes and materials for sealed joints of sheet materials in machine building and construction.
A sealed blind rivet is a type of fastener designed to create a strong, permanent joint between sheet materials. Such joints are resistant to water and air penetration, which allows the rivets to be used in watercraft manufacturing and other areas of machine building. The design includes a closed-type body and a mandrel head; both components are made from corrosion-resistant materials. Installation requires a pre-drilled hole in the sheet material, with a size that should not exceed the body diameter by more than 0.2 mm.
Design features and materials
Sealed blind rivets consist of a sleeve (body) and a mandrel — a metal rod with a mandrel head. A distinctive feature of closed-type rivets is the sealed body: the end opposite the flange is blind (closed).
As a result, the joint is protected against the penetration of moisture, air, or chemicals.
The main materials used for the body are stainless or zinc-plated steel; steel with a protective phosphate coating or aluminium is also used. The mandrel is made from materials resistant to prolonged exposure to moisture and protected against corrosion. Blind rivets are divided into several types:
- With a standard or countersunk flange, depending on the installation purpose.
- With the sleeve and rod made of the same or different materials.
The body can be colored in various shades to improve the decorative appearance of the joint. The products are available in a wide range of lengths and rod diameters, allowing sheet materials of different thicknesses to be joined. Installation is done with a rivet gun, which makes it possible to install the fasteners in locations accessible from one side only.
Industrial applications
Rivets of this type create sealed joints, which makes them in demand across various branches of machine building. They are used in automotive manufacturing, machine-tool building, shipbuilding, and the production of industrial equipment for the chemical, pharmaceutical, and other industries. They are also used in construction for sealed joining of sheet materials, in the assembly of structures subject to constant aggressive environmental exposure. The resulting joint is strong and durable, and the rivets can be used as a substitute for welding where welding is not feasible.
FLOK supplies sealed blind rivets in a wide range of sizes.
| Rivet diameter d | 3.2 | 4 | 4.8 |
|---|---|---|---|
| Flange diameter d₂ | 6.5 | 8.0 | 9.5 |
| Flange height k | 1.1 | 1.3 | 1.8 |
| Hole diameter | 3.3 | 4.1 | 4.9 |
| Body length L | Thickness of joined materials (min. - max.) | ||
| 6.5 | 0.5 - 2.0 | - | - |
| 7.5 | 1.0 - 3.0 | - | - |
| 8 | 1.5 - 3.0 | 0.5 - 3.0 | 1.0 - 3.0 |
| 9.5 | 3.0 - 5.0 | 3.0 - 5.0 | 3.0 - 5.0 |
| 10.5 | 5.0 - 6.5 | - | - |
| 11 | 4.5 - 6.5 | 4.5 - 6.5 | 4.5 - 6.5 |
| 12.5 | 6.0 - 8.0 | 6.0 - 8.0 | 6.0 - 8.0 |
| 14 | - | - | 7.5 - 9.5 |
| 16 | - | - | 9.0 - 11.0 |
| 18 | - | - | 10.5 - 13.0 |
| 21 | - | - | 13.0 - 16.0 |
| Rivet diameter d | 3.2 | 4 | 4.8 |
|---|---|---|---|
| Rivet body material | Rivet shear strength (tensile), N | ||
| Aluminium alloy (~ISO 15973) | 1050 (1250) | 1550 (2100) | 2400 (3500) |
| Copper | 1000 (1400) | 1500 (2200) | 2100 (3100) |
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