5mm x 20mm Polyfix 30° Thread Profile - T20 Torx Countersunk Screws - Stainless Steel - (A2) Description
The 5mm x 20mm Polyfix 30° Thread Profile - T20 Torx Countersunk Screws - Stainless Steel - (A2) has the following features:
- Countersunk Angle: 90 Degrees
- Countersunk Angle Tolerance: +/-2 Degrees
- Drive Size: T20
- Natural Finish
- Head Diameter (D): 9.3 mm
- Head Length (H): 3.4 mm
- Length (L): 20 mm
- Stainless Steel - (A2)
- Stainless Steel Material Family
- System of Measurement: Metric
- Thread Profile: 30 Degrees
- Thread Size: 5 mm
Discover more about the 30° Thread Profile Torx Countersunk Screws range.
30° thread profile torx countersunk self-tapping screws are precision-engineered fasteners designed for high-performance assembly in plastics and 3D printed materials.
These components are designed with a unique combination of features, a high-torque torx drive for slip-free installation, a countersunk head for a perfectly flush finish and a sharp 30° thread profile. This acute thread angle is specifically engineered to slice cleanly into plastics.
How 30° Thread Profile Torx Countersunk Self-Tapping Screws Work
The key to this screw's performance is its specialised 30° thread profile. It is designed to cut its own mating thread into a pilot hole with minimal radial force. This slicing action is critical for brittle or layered materials like soft plastics and 3D printed parts, as it prevents splitting and ensures a strong, reliable joint.
The countersunk head is engineered to sit perfectly flush or sub-flush with the component's surface once installed into a matching countersunk hole. Providing a clean, professional and "snag-free" finish, making it ideal for moving parts, external housings or any application where a protruding screw head is undesirable.
This is paired with a torx drive, which allows for higher torque transmission than conventional drives. This ensures a secure, positive engagement, reducing the risk of "cam-out" and damage to the screw or the component during installation.
Engineers can use these screws to mount a control panel or sensor bracket to a 3D printed housing. The 30° thread ensures the housing doesn't crack, while the countersunk head sits perfectly flush, preventing any interference with other moving parts and providing a sleek, finished look.
Materials 30° Thread Profile Torx Countersunk Self-Tapping Screws Are Made From
To suit a variety of engineering applications, these screws are available in two primary materials:
- Steel (1022): A high-strength carbon steel, ideal for internal components and prototypes where load-bearing capacity is the main priority.
- Stainless Steel (A2): Offers excellent corrosion resistance, making it the perfect choice for products that will be used in damp environments or exposed to the elements.
Sizes and Types of 30° Thread Profile Torx Countersunk Self-Tapping Screws Available
Our range is precision-manufactured to support projects of all scales, from intricate electronics to larger mechanical assemblies. We offer thread sizes from 2.2mm up to 5mm and lengths from 6mm to 25mm.
These components are available with a variety of finishes to meet your functional or aesthetic needs. Our steel screws are available with a bright zinc plating or a black zinc plating, while our A2 stainless steel screws are offered untreated or with a matte AccuBlack finish.
FAQs
What is the main benefit of a 30° thread profile?
The sharp 30° angle is designed specifically for soft plastics and 3D printed materials. It slices into the material to form a thread with very low outward stress, which is crucial for preventing cracking, splitting or bulging.
Why use a countersunk screw?
A countersunk screw is designed to sit level with or just below the surface of the material in a pre-drilled countersunk hole. This creates a clean, flush finish that is essential for a professional appearance and to prevent snagging on clothing or other components.
What is the advantage of a Torx drive?
The Torx drive design provides a much larger contact area between the driver bit and the drive of the screw. This allows for higher torque to be applied during installation and virtually eliminates the risk of cam-out.
Do I need to drill a special hole for these screws?
For the head to sit flush, you must use a countersunk bit (or design a countersink into your 3D model, if 3D printing) to create a cone-shaped recess in the pilot hole that matches the angle of the screw's head. These components also require a pilot hole for the thread to tap into.
