Blind Rivet with Countersunk Flange
Blind rivets with countersunk flange for sheet metal, in steel, stainless steel, aluminium or combined design. FLOK supplies them for machine building.
Blind rivets with a countersunk flange are used for fastening sheet metal parts, forming a strong permanent joint. They are designed for installation into a pre-countersunk hole: the countersunk flange sits fully flush in the material and does not protrude above the surface. This makes the joint invisible from the outside.
Rivets can be made from alloy or stainless steel, as well as aluminium, with combined designs available for enhanced corrosion protection. The rivets are used in machine building across various industries as an alternative to welding where only one-sided access to the material is available.
| Rivet diameter d | 3 | 4 | 5 |
|---|---|---|---|
| Flange diameter d₂ | 6.0 | 7.5 | 9.0 |
| Flange height k | 0.9 | 1.0 | 1.2 |
| Height c | 0.3 | 0.3 | 0.4 |
| Hole diameter | 3.1 | 4.1 | 5.1 |
| Body length L | Thickness of fastened materials for 88411/88412 (min - max) | ||
| 4 | - /1.0 - 1.5 | - | - |
| 6 | 1.0 - 3.0/1.5 - 3.5 | 1.0 - 2.5/1.0 - 3.0 | 1.0 - 2.0/- |
| 8 | 3.0 - 5.0/3.5 - 5.0 | 2.5 - 4.5/3.0 - 5.0 | 2.0 - 4.0/2.0 - 4.5 |
| 10 | 5.0 - 6.5/5.0 - 7.0 | 4.5 - 6.5/5.0 - 6.5 | 4.0 - 6.0/4.5 - 6.0 |
| 12 | 6.5 - 8.5/7.0 - 9.0 | 6.5 - 8.5/6.5 - 8.5 | 6.0 - 8.0/6.0 - 8.0 |
| 14 | - | - | 8.0 - 9.5/- |
| 16 | -/9.0 - 13.0 | 8.5 - 12.0/8.5 - 12.5 | - |
| 18 | - | -/12.5 - 14.5 | - |
| 20 | - | 12.0 - 16.0/14.5 - 16.5 | - |
| Rivet diameter d | 3 | 4 | 5 |
|---|---|---|---|
| Rivet material | Rivet shear strength (tensile), N | ||
| Aluminium alloy | 550 (850) | 1250 (1800) | 2150 (3100) |
| Zinc-plated steel | 950 (1100) | 1700 (2200) | 3100 (4000) |
| Size | Thickness of materials being joined | Flange diameter | Hole diameter |
|---|---|---|---|
| 2.4×6 | 1.5 - 4.0 | 5.0 | 2.5 - 2.6 |
| 2.4×8 | 4.0 - 6.0 | ||
| 2.4×10 | 6.0 - 8.0 | ||
| 3.0 x 6 | 1.5 - 3.5 | 6.0 | 3.1 - 3.2 |
| 3.0 x 8 | 3.5 - 5.5 | ||
| 3.0 x 10 | 5.5 - 7.0 | ||
| 3.0 x 12 | 7.0 - 9.0 | ||
| 3.0 x 14 | 9.0 - 12.0 | ||
| 3.2 x 6 | 1.5 - 3.5 | 6.0 | 3.3 - 3.4 |
| 3.2 x 8 | 3.5 - 5.0 | ||
| 3.2 x 10 | 5.0 - 7.0 | ||
| 3.2 x 12 | 7.0 - 9.0 | ||
| 3.2 x 14 | 9.0 - 10.5 | ||
| 3.2 x 16 | 10.5 - 13.0 | ||
| 4.0 x 6 | 1.5 - 3.0 | 7.5 | 4.1 - 4.2 |
| 4.0 x 8 | 3.0 - 5.0 | ||
| 4.0 x 10 | 5.0 - 6.5 | ||
| 4.0 x 12 | 6.5 - 8.5 | ||
| 4.0 x 14 | 8.5 - 10.5 | ||
| 4.0 x 16 | 10.5 - 12.5 | ||
| 4.8 x 6 | 1.0 - 3.5 | 9.0 | 4.9 - 5.0 |
| 4.8 x 8 | 2.0 - 4.5 | ||
| 4.8 x 10 | 4.5 - 6.0 | ||
| 4.8 x 12 | 6.0 - 8.0 | ||
| 4.8 x 14 | 8.0 - 10.0 | ||
| 4.8 x 16 | 10.0 - 12.0 | ||
| 5.0 x 8 | 2.5 - 4.5 | 9.0 | 5.1 - 5.2 |
| 5.0 x 10 | 4.5 - 6.0 | ||
| 5.0 x 12 | 6.0 - 8.0 | ||
| 5.0 x 14 | 8.0 - 10.0 | ||
| 5.0 x 16 | 10.0 - 12.0 |
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