Black Hex Head Turning Screws

The tightening effect of the Black Hex Head Turning Screws largely depends on their material grade. The grades of carbon steel screws include ISO 898-1 categories 4.6, 8.8, 10.9 or 12.9, etc. These grades indicate their strength when subjected to tension. The higher the grade, the greater the strength.

For stainless steel grades, such as A2-70 or A4-80 (in accordance with ISO 3506 standards), alloy steel hexagonal head screws (such as ASTM A490 standards) are very strong and therefore very suitable for important structural connections that require this level of strength. The properties of the material you choose directly determine the upper limit of the weight it can bear and its applicability under specific environmental conditions.

Product Benefits

To install Black Hex Head Turning Screws correctly, you need to pick the right size wrench or socket that fits tight on the flat parts of the head—this keeps the head from getting rounded. Using a torque wrench is a good idea, especially for important jobs. It makes it easy to find the right tightness (i.e., clamping force) without worrying about breaking it by applying too much force.

People often put washers under the head of these screws. They help spread out the load, protect the surface, or even work as a lock washer. Also, making sure the threads are clean and using thread-locking stuff can keep them from coming loose in places that vibrate a lot.

Product Parameters

FAQ

Q: What surface treatments or platings do you offer on Black Hex Head Turning Screws for corrosion resistance?

A:We offer different ways to protect Black Hex Head Turning Screws from rust. Zinc plating is pretty common—usually with blue, yellow, or clear finishes—and it gives basic rust protection. Hot-dip galvanizing puts on a thick, strong zinc layer, which works well for harsh outdoor spots.

If you need the best rust protection, especially against salt, you can get these screws in stainless steel (A2 or A4). There are also special coatings like Geomet® or Dacromet. These options help make the screws last a lot longer.