DIN 912 M10x40 socket head bolt 8.8 galvanised

The bolt is widely used in machine building, structures and assembly work, where a compact head and a solid connection are required. Because the head is not as wide as that of a hex bolt, it also fits in places where there is little space. You can order the bolt directly on this page.

What do DIN 912 and strength class 8.8 mean

DIN 912 is the standard for socket head cap screws. Class 8.8 indicates the strength of the steel and is in practice regarded as a common choice for general structures and assembly work. For connections that are subject to heavier loads, higher classes exist. Therefore, always check whether 8.8 meets the requirements of your application.

Galvanised: which environment is it suitable for

The zinc coating gives the bolt basic protection against rust. This works well in dry, indoor spaces. If you use the bolt outdoors or in a damp environment, consider whether galvanised is sufficient or whether stainless steel is a better choice. Also pay attention to combinations with other metals, as these can affect corrosion.

Choosing the right M10x40 socket head bolt

When choosing, pay attention to the length, as it must match the thickness of the parts to be joined plus the nut or the tapped hole. Take into account the thread length and the right Allen key for the head of an M10 bolt. Where necessary, use a washer or locking device so that the connection does not come loose due to vibrations.

Frequently asked questions

What does M10x40 mean for a bolt?

M10 stands for a thread diameter of 10 millimetres and 40 for a length of 40 millimetres.

Which key do you need for this bolt?

You tighten the bolt with an Allen key. Check the size of the hex socket for an M10 bolt according to the standard before you start.

Is this bolt suitable for outdoor use?

The zinc coating offers limited protection. For long-term outdoor use or in damp areas, stainless steel is often a better choice.