3.5mm x 14mm Polyfix 30° Thread Profile - Phillips Countersunk Screws - Stainless Steel - (A2) Description
The 3.5mm x 14mm Polyfix 30° Thread Profile - Phillips Countersunk Screws - Stainless Steel - (A2) has the following features:
- Countersunk Angle: 90 Degrees
- Drive Size: PH2
- Natural Finish
- Head Diameter (D): 7.3 mm
- Head Length (H): 2.55 mm
- Length (L): 14 mm
- Stainless Steel - (A2)
- Stainless Steel Material Family
- System of Measurement: Metric
- Thread Profile: 30 Degrees
- Thread Size: 3.5 mm
Discover more about the 30° Thread Profile Phillips Countersunk Screws range.
30° thread profile phillips countersunk self-tapping screws for plastics are precision-engineered fasteners, designed specifically for secure, flush-fitting assemblies in plastics and 3D printed materials.
This fastener's design is defined by a precise combination of features; a classic Phillips drive for widespread tool compatibility, a countersunk head for a perfectly flush finish and its core innovation, the 30° thread profile. This sharp thread angle is engineered to slice cleanly into soft plastics, unlike standard 60° threads which can exert high radial pressure. This action forms a secure, self-tapped thread without causing the material to bulge, crack or delaminate along 3D print layer lines.
How 30° Thread Profile Phillips Countersunk Self-Tapping Screws Work
The exceptional performance of this screw in plastics comes from its specialised 30° thread profile. This acute angle is designed to cut its own mating thread into a pilot hole with minimal outward force. This slicing action is essential for brittle or layered materials, as it drastically reduces the stress that causes splitting and ensures a strong, reliable joint.
The countersunk head is engineered with a 90° angular shape that allows it to sit perfectly level with or just below the material’s surface, provided it is installed into a matching countersunk hole. This creates a clean, professional and "snag-free" finish, which is critical for external panels, moving parts or any application where a smooth surface is required.
This is combined with the classic phillips drive, a widely-recognised cross-head drive system. Its universal design ensures that compatible driver bits are readily available, making it a convenient choice for prototyping and general assembly.
In the assembly of custom electronic enclosures, an engineer 3D printing a case can use these screws to mount the lid. The 30° thread will create a strong fixing in the plastic bosses without cracking them and the countersunk head will provide a sleek, flush finish, ensuring no part of the screw protrudes from the casing.
Materials 30° Thread Profile Phillips Countersunk Self-Tapping Screws Are Made From
To suit a range of engineering requirements, these screws are available in two primary materials:
- Steel (1022): A strong, reliable carbon steel, ideal for general-purpose prototyping and internal applications where high strength is the priority.
- Stainless Steel (A2): This material provides excellent corrosion resistance, making it the perfect choice for products that may be exposed to moisture, chemicals or outdoor environments.
Sizes and Types of 30° Thread Profile Phillips Countersunk Self-Tapping Screws Available
Our range is designed to support projects from micro-electronics to larger mechanical assemblies. We offer thread sizes from 2.2mm up to 6mm and lengths ranging from 5mm to 25mm. To meet both functional and aesthetic requirements, a variety of finishes are available. Our steel range can be finished with a bright zinc plating for corrosion resistance or a sleek black zinc plating. Stainless steel components are available untreated for a clean metallic look or with our non-reflective AccuBlack finish.
FAQs
What is the main advantage of a 30° thread profile?
The sharp 30° angle is specifically designed 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.
What is the benefit of a countersunk head?
A countersunk head 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.
Do these screws require a special pilot hole?
These screws are thread-forming, meaning they require a pre-drilled pilot hole. Also, to achieve a flush finish, the pilot hole must also have a countersunk recess at the top that matches the angle of the screw's head.
