| Thread Size | M3x0.5 |
| Thread Code | M3 |
| Screw Length Code | 40 mm |
| A Shank Max. | 1.53 mm |
| Min. Sheet Thickness | 1.53 mm |
Hole Size in Sheet + 0.08 |
6.73 mm |
| C Max. | 6.71 mm |
| E ± 0.25 | 8.74 mm |
| G ± 0.4 | 6.4 mm |
| P ± 0.64 | 0 mm |
| T1 Nom. | 9.4 mm |
| T2 Nom. | 13.72 mm |
| Driver Size | #1 |
| Min. Dist. Hole C/L to Edge | 6.35 mm |
| Material Retainer | 400 Series Stainless Steel |
| Material Spring | 300 Series Stainless Steel |
| Screw Material | 400 Series Stainless Steel |
| Finish Spring | Natural Finish |
| Retainer Finish | Passivated and/or tested |
| Screw Finish | Passivated and/or tested |
Installation Equipment/Method |
Self-Clinching |
| Base Panel Material | Aluminum, Steel |

What Are Captive Panel Screws?
Captive panel screw, also known as panel clamp fasteners or simply fixed screws, are a special fastener designed to improve the efficiency and reliability of panel assembly. Unlike traditional screws, fixed panel screws remain firmly fixed to the panel or cabinet even when completely loosened. This unique feature prevents the screws from being lost during maintenance or assembly, making them an indispensable component in a variety of industries.
Set screws, including the popular 440 set screw, are essential for applications where secure, reusable and user-friendly fixation is important. They are designed to allow for easy removal and quick adjustment without worrying about misplacing the screw. This is especially useful in environments where panels need to be frequently maintained or upgraded, such as the electronics, automotive and aerospace industries.
Captive panel screws do more than just provide convenience. They significantly increase assembly efficiency by ensuring that screws are always available and secured to the panel. Technicians can focus on their work instead of searching for lost screws, resulting in faster turnaround times and lower labor costs.
In addition to the practical benefits, fixed panel screws also create a neater and more organized workspace. There is no need to deal with loose screws, minimizing the risk of contamination or damage to sensitive components. This is especially important in high-risk environments where precision and reliability are critical.
In summary, self-drilling screws, including 440 type self-drilling screws and other models, are indispensable fasteners that provide a safe, efficient and user-friendly solution for panel fastening. Their ability to maintain connection during use not only prevents loss, but also improves overall production efficiency, making them the first choice for various industrial applications.


