Screws for Plastic

Our Screws for Plastic are available in Zinc Plated Steel (Silver + Black) as well as Stainless Steel. We offer a variety of head and thread styles, please see our Complete Guide to Screws for Plastic. For a shorter guide showing only recommended hole sizes and tolerances please see:

Screws for Plastic are designed specifically for predrilled or moulded pilot holes in plastic. They create threads in plastics by thread forming as opposed to a traditional self tapping screw that cuts into the material.

What are the benefits of using screws specifically designed for cutting into plastic?

• Reduced radial stress on the material, decreasing stress and the potential for bursting or cracking.
• Increased thread engagement, increasing pull out resistance.
• Reduced chance of stripping threads.
• Reduces backing out of the fastening due to creep.

What type of thread do I need?

• PT30: 30 Degree Thread designed for good performance in the majority of plastics. This thread has low installation torque and can be used on thinner bosses due to the reduced readial stress.
• PT45: 45 Degree Thread which features a trilobular body and shorter threads designed for use with harder plastics. This thread type is the middle ground between a PT30 and a regular self tapping screw.

Click Here to find our more about the different thread types.

Our Screws for Plastics are all available in three materials:

Bright Zinc Plated Steel – This is the most commonly used and standard finish as it's economical and suitable for the majority of applications, featuring a bright metallic silver colour.
Black Zinc Plated Steel – This finish is mechanically identical to the silver colour zinc. They are commonly used for their aesthetic purposes, in industries such as automotive interiors, PC or computer server building or retail displays.
A2 Stainless Steel – This material has the highest corrosion resistance, usable in industries such as petrol / chemical applications, outdoor applications as well as food / catering.

And all of them are available with the following heads, in both a Pozi and Torx driver.

Pan Head – This is our most common head, suitable for a wide range of implementations.
Countersunk – This head style allows for the surface of the screw head to be flush against the surface of the panel.
Flanged – This is the widest head we offer, the wider head is better as spreading stress over a wider area, particularly of relevance when working with softer plastics.

Need help choosing the right screw? Get in contact on 01233 731581.

We also stock Bolts and Screws, as well as Washers and Nuts.