J-System DIN7504K ZSK SW10 ZN hex head 6.3 x 19

The designation 6.3x19 indicates the dimensions: 6.3 mm is the diameter of the thread and 19 mm the length. Check beforehand that the length suits the thickness of the materials you want to join.

Hex head with SW10: advantages when screwing

A hex head is tightened with a socket wrench or socket bit. This gives a firm grip, even at a higher tightening torque, and the bit is less likely to slip off the head than with a Phillips head. The width across flats of 10 mm means you need a 10 mm socket. This way you choose the right bit before you start.

Galvanized steel: what is it suitable for

The zinc layer offers basic protection against corrosion and is mainly suitable for dry, indoor applications. In a damp environment, in a marine climate or under chemical exposure, stainless steel is usually a better choice. Keep this in mind for outdoor applications or in an aggressive environment.

Drilling capacity and material thickness

Each self-drilling screw can only drill through a limited total sheet thickness. Whether the tip of this screw is suitable for your material depends on the thickness and the type of sheet. Check the technical data and, if necessary, test first on an offcut of the material.

Frequently asked questions

Do I need to pre-drill with a self-drilling screw?

No, the drill point makes the hole itself and forms the thread. You do need a screwdriver or cordless screwdriver with a suitable socket.

Which socket do I need for this screw?

A 10 mm socket, matching the SW10 width across flats of the hex head.

Is a galvanized screw suitable for outdoor use?

The zinc layer offers limited protection. For outdoors, damp spaces or aggressive environments, stainless steel is usually better.