M-Bulb Rivets
Clamp-Type Bulbing · Extreme Shear • Ø d = 4.8 – 7.9 mm
Engineering Overview
A unique, clamp-type fastener offering high shear strength in specific applications. Its bulbing action during installation spreads the load over more surface area, supplying a stronger, longer-lasting connection, while offering superior blind side strength.
PRODUCT PHOTOØ d = 4.8 – 7.9 mm

Applications
Materials
- • High-Shear Sheet Metal
- • Transportation Superstructures
- • Heavy HVAC & Enclosures
- • ST/ST (Steel / Steel)
Dimensional CAD Reference • M-Bulb RivetsUnit: mm

A: Sleeve Ø
B: Head Ø
C: Head Height
D: Sleeve Length
E: Total Length
Installed: Blind-Side Lock
| Size / Part No | Grip Range (mm) | Head | dk / k (mm) | dm / Pmin | Tensile / Shear (N) |
|---|---|---|---|---|---|
| Ø4.8 × 16.5 (MLP-R6-M2) | 1.2 – 2.8 | Protruding | 9.9 / 2.6 | 3.1 / 20 | ST/ST: 4700N / 8700N |
| Ø4.8 × 17.5 (MLP-R6-M3) | 2.2 – 3.8 | Protruding | 9.9 / 2.6 | 3.1 / 20 | ST/ST: 4700N / 8700N |
| Ø4.8 × 18.5 (MLP-R6-M4) | 3.2 – 4.8 | Protruding | 9.9 / 2.6 | 3.1 / 20 | ST/ST: 4700N / 8700N |
| Ø4.8 × 19.5 (MLP-R6-M5) | 4.2 – 5.8 | Protruding | 9.9 / 2.6 | 3.1 / 20 | ST/ST: 4700N / 8700N |
| Ø4.8 × 20.5 (MLP-R6-M6) | 5.2 – 6.8 | Protruding | 9.9 / 2.6 | 3.1 / 20 | ST/ST: 4700N / 8700N |
| Ø4.8 × 21.5 (MLP-R6-M7) | 6.2 – 7.8 | Protruding | 9.9 / 2.6 | 3.1 / 20 | ST/ST: 4700N / 8700N |
| Ø4.8 × 22.5 (MLP-R6-M8) | 7.2 – 8.8 | Protruding | 9.9 / 2.6 | 3.1 / 20 | ST/ST: 4700N / 8700N |
| Ø4.8 × 24.5 (MLP-R6-M10) | 9.2 – 10.8 | Protruding | 9.9 / 2.6 | 3.1 / 20 | ST/ST: 4700N / 8700N |
| Ø6.4 × 21 (MLP-R8-M2) | 1.5 – 3.5 | Protruding | 13.4 / 3.2 | 4.1 / 24 | ST/ST: 8500N / 15600N |
| Ø6.4 × 22 (MLP-R8-M3) | 2.8 – 4.8 | Protruding | 13.4 / 3.2 | 4.1 / 24 | ST/ST: 8500N / 15600N |
| Ø6.4 × 23 (MLP-R8-M4) | 3.8 – 5.8 | Protruding | 13.4 / 3.2 | 4.1 / 24 | ST/ST: 8500N / 15600N |
| Ø6.4 × 24 (MLP-R8-M5) | 4.8 – 6.8 | Protruding | 13.4 / 3.2 | 4.1 / 24 | ST/ST: 8500N / 15600N |
| Ø6.4 × 26 (MLP-R8-M7) | 6.8 – 8.8 | Protruding | 13.4 / 3.2 | 4.1 / 24 | ST/ST: 8500N / 15600N |
| Ø6.4 × 28 (MLP-R8-M9) | 8.8 – 10.8 | Protruding | 13.4 / 3.2 | 4.1 / 24 | ST/ST: 8500N / 15600N |
| Ø6.4 × 31 (MLP-R8-M12) | 11.8 – 13.8 | Protruding | 13.4 / 3.2 | 4.1 / 24 | ST/ST: 8500N / 15600N |
| Ø6.4 × 34 (MLP-R8-M15) | 14.8 – 16.8 | Protruding | 13.4 / 3.2 | 4.1 / 24 | ST/ST: 8500N / 15600N |
| Ø7.9 × 28.5 (MLP-R10-3) | 3.8 – 6.4 | Protruding | 16.8 / 3.9 | 5.2 / 28 | ST/ST: 13200N / 22200N |
| Ø7.9 × 29.8 (MLP-R10-4) | 5.1 – 7.6 | Protruding | 16.8 / 3.9 | 5.2 / 28 | ST/ST: 13200N / 22200N |
| Ø7.9 × 31.1 (DLP-R10-5) | 6.4 – 8.9 | Protruding | 16.8 / 3.9 | 5.2 / 28 | ST/ST: 13200N / 22200N |
| Ø7.9 × 32.4 (MLP-R10-6) | 7.6 – 10.2 | Protruding | 16.8 / 3.9 | 5.2 / 28 | ST/ST: 13200N / 22200N |
| Ø7.9 × 35 (MLP-R10-8) | 10.2 – 12.7 | Protruding | 16.8 / 3.9 | 5.2 / 28 | ST/ST: 13200N / 22200N |
| Ø7.9 × 37.6 (MLP-R10-10) | 12.7 – 15.2 | Protruding | 16.8 / 3.9 | 5.2 / 28 | ST/ST: 13200N / 22200N |