J-System hex head stud bolt DIN933 8.8 ZN M8 x 35

Because the thread runs all the way up to the head, a hex head bolt is suitable for connections where you want to fully tighten the bolt, for example in a threaded hole or through thin sheet parts. Below you can read what to pay attention to before you order.

What does 8.8 and galvanized mean?

The designation 8.8 indicates the strength class of the bolt. It is a common class for construction and machine building, where a sturdy connection is needed. ZN stands for a zinc coating. It protects the steel against rust under normal use indoors or in a dry environment. If you are working in a damp or outdoor environment, also consider a stainless steel A2 version, which appears under related products on the same page.

Determining the right length for an M8x35 hex head bolt

Measure the total thickness of the parts to be joined, plus the thickness of any washer and nut. After tightening, the bolt should protrude a few thread pitches beyond the nut. If the bolt goes into a threaded hole, it must engage far enough, but it must not bottom out in the base of the hole. If you are unsure between two lengths, compare the other M8 sizes in the same category.

Matching nut and washer

An M8 bolt requires a nut with the same thread size. Preferably use parts of the same material and coating, so the connection ages evenly. A washer under the head or the nut distributes the pressure, especially with softer materials such as wood or aluminium.

Ordering and delivery

This item is available to order, with delivery time on request. If you need multiple sizes or larger quantities, please contact Proffix. You can order via the webshop, by phone or by email.

Frequently asked questions

What is the difference between DIN 933 and DIN 931?

With DIN 933 the thread runs along the full length of the shank. With DIN 931 there is a part without thread, the so-called shank.

Is a galvanized hex head bolt suitable for outdoor use?

Galvanizing provides basic protection against corrosion. For long-term use in damp or outdoor conditions, a stainless steel A2 variant is usually a better choice.

What spanner size do you need for an M8 hexagon bolt?

An M8 hexagon bolt according to DIN 933 normally requires a spanner size of 13 millimeters.