| 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 | 7.92 mm |
| G ± 0.4 | 6.4 mm |
| P ± 0.64 | 0 mm |
| T1 Max. | 9.14 mm |
| T2 Nom. | 13.72 mm |
| Driver Size | #1 |
| Min. Dist. Hole C/L to Edge | 6.35 mm |
| Material Retainer | 300 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 screws, commonly known as 440 locking screws or panel clamp fasteners, are a type of specialized fastener designed to improve the efficiency and reliability of panel assembly. These innovative components are essential in a variety of industries such as electronics, automotive, and manufacturing where safe and reliable fastening is critical.
Unlike conventional screws, Captive Panel Screws stay firmly fixed to a panel or cabinet even if completely loosened. This unique feature significantly reduces the risk of screw loss during maintenance or assembly, making it an indispensable part of any project involving panel mounting. The design of the Captive Screws allows for easy access and quick adjustment without the worry of misplacing the fastener.
Set screws come in a variety of sizes and materials, with the 440 set screw being one of the most common types. The name refers to the diameter and thread pitch of the screw, which have been standardized to be compatible with a wide range of applications. Set screws are used in a wide variety of environments, from high-tech electronics to harsh industrial settings.
In addition to their practical benefits, captive panel screws can also help create a neater, more organized workspace. By eliminating loose screws, they help keep assembly areas tidy, reduce accidents, and improve overall efficiency.
In summary, panel screws, including 440 set screws and other panel fasteners, are vital components in modern assembly processes. Their ability to securely fasten to panels while providing a secure fastening makes them the preferred choice of engineers and manufacturers. Whether you are dealing with complex electronic equipment or simple cabinets, incorporating set screws into your design can enhance functionality and reliability.