45° Thread Profile Pozi Flanged Button Head Screws.

What are 45° Thread Profile Pozi Flanged Button Head Screws?

45° thread profile pozi flanged button head self-tapping screws are specialised fasteners designed to create their own threads within softer materials, particularly thermoplastics and resin-based assemblies. Unlike standard self-tapping screws which typically feature a 60° thread angle, these components utilise a sharper 45° profile. This distinct geometry allows the screw to slice deeply into the mating material rather than simply displacing it, creating a secure hold with minimal radial stress.

Visually, these screws are defined by their integrated flange, a wide, flat surface at the base of the button head and a pozi drive, which is widely recognised for its enhanced cam-out resistance compared to standard Phillips drives. They are the go-to solution for engineers looking to fasten plastic components without the risk of cracking or bursting the mounting bosses.

How 45° Thread Profile Pozi Flanged Button Head Self-Tapping Screws Work

The primary engineering challenge when fastening plastics, such as those used in 3D printing or injection moulding, is managing stress. Standard 60° screws displace a significant volume of material outwards, creating high radial stress that can cause plastic bosses to split.

These screws solve that problem through their specific 45° thread angle. The sharper profile cuts into the plastic with less resistance, significantly reducing the outward pressure exerted on the boss walls. This ensures a tight, high-strength connection that reduces the likelihood of material failure during installation.

The flanged button head plays a critical role in the longevity of the assembly. By increasing the surface area under the head, the flange acts as an integrated washer. This distributes the clamping load over a wider area, which is essential for preventing creep; the tendency of plastic to deform permanently under constant stress. Meanwhile, the pozi drive ensures higher torque transmission, allowing for secure installation without the driver slipping and damaging the screw head or the surrounding plastic.

These screws can be used to assemble 3D-printed enclosures made from PLA or ABS. The 45° profile cuts a clean thread into the printed layers without delaminating them, while the flange covers any minor imperfections in the clearance hole, ensuring a professional, finished look.

Materials 45° Thread Profile Pozi Flanged Button Head Self-Tapping Screws Are Made From

These screws are manufactured from high-grade A2 Stainless Steel, chosen for its excellent balance of corrosion resistance and mechanical strength. This makes them suitable for both internal and external applications where moisture may be present. To suit different aesthetic requirements, they are available in two distinct finishes:

• Natural: The standard, clean stainless steel look, ideal for medical devices or general engineering where hygiene and visibility are key.
• AccuBlack: A specialised chemical matte black finish that is non-reflective. This is perfect for discrete internal fixings in consumer electronics or automotive interiors where the fastener needs to blend seamlessly with black plastic housings.

Sizes and Types of 45° Thread Profile Pozi Flanged Button Head Self-Tapping Screws Available

Our range is optimised for precision applications, with thread diameters available from 3.5mm to 5mm. To accommodate various assembly depths and boss sizes, we offer lengths ranging from 6mm up to 25mm. All variations feature the standard pozi drive for compatibility with common tooling.

FAQs

Q: Why use a 45° thread profile instead of a standard self-tapping screw? 

A: The 45° thread profile is sharper than the standard 60° profile found on standard wood or metal screws. This sharper angle reduces the radial force applied to the material, which significantly lowers the risk of cracking plastic bosses or 3D printed parts during installation.

Q: Do I need a washer with these screws?

A: The integrated flange on the button head acts as a washer, spreading the load across a wider surface area. This helps protect the plastic surface and prevents the screw from sinking into softer materials.

Q: Are these screws suitable for 3D printed parts? 

A: Yes, they are excellent for 3D printed materials like PLA, PETG and ABS. The thread profile is designed to minimise stress, which helps prevent the common issue of layer separation or boss splitting in printed components.

Q: What is the benefit of the Pozi drive?

A: The Pozi drive offers better engagement and torque transfer than a standard Phillips drive. It reduces the risk of cam-out, which is vital when applying the precise torque needed to form threads in plastic without stripping them.

Bespoke 45° Thread Profile Pozi Flanged Button Head Screws Manufacture.

High precision, bespoke manufacture of 45° Thread Profile Pozi Flanged Button Head Screws to customer specification. State of the art facilities specialising in both small batch prototyping and large scale manufacture.