J-System SPP screw FT VZK PZD stainless A2 4.5 x 20

This screw suits anyone who prefers not to use galvanised steel and chooses stainless steel instead. Below you can read what to look for when choosing.

What does RVS A2 mean for a chipboard screw?

A2 is a commonly used grade of stainless steel. Screws in stainless steel do not rust like ordinary steel, which is why they are often chosen for applications with moisture, such as kitchens, bathroom furniture or a workplace in a damp environment. For environments with salt or aggressive substances, a different stainless steel grade is often used; if in doubt, please seek advice.

Countersunk head and Pozidriv drive

A countersunk head is designed to be driven flush into the material, so the surface stays smooth. Pozidriv is a cross head with extra notches, recognisable by the small lines between the arms of the cross. For this size, a matching Pozidriv bit (PZ2 is common) gives a good grip and prevents the head from cam-out.

Which length and diameter do you need?

With 4,5x20 the screw is 20 mm long. A rule of thumb is that the screw should grip well into the base material, without coming through the back. Therefore measure the thickness of both parts you want to connect. With hard or thin sheet materials, pre-drilling can help prevent cracks.

Frequently asked questions

Is this screw suitable for outdoor use?

RVS A2 resists rust and is often also used outdoors. For coastal areas or contact with salt, a different stainless steel grade is usually better.

Which bit fits a Pozidriv screw?

Use a Pozidriv bit. A regular Phillips bit fits less well and can damage the head more quickly.

Do I need to pre-drill for chipboard?

This is not always necessary, but near the edge of the sheet material or in hard material, pre-drilling can prevent cracks.