Screws with external driving feature

Thread-rolling screws for metals create their own thread during assembly. This requires pre-punching. Once the screw has been installed, it often creates a hole with a metric thread. This means that the thread-rolling screw can be exchanged for a metric DIN or ISO screw during servicing. As a result, these screws can be used efficiently for a wide variety of applications.

Standards

• DIN 7500 D 

The screw thread runs all the way from the tip to the head. There are special types such as the heavy-duty tip tapping screw, which penetrates the sheet to be joined so there is no need for prepunching. There are also double-thread types that take less time to screw in. Both coarse and fine threads are used in these applications, which affects both the reusability of the screw, and the resilience of the thread.

Standards

• DIN 7976, similar to ISO 1479
• DIN 7504 K, similar to ISO 15480

These screws have a hexagonal head and a dog point at the end of the bolt shaft. They can be used to absorb the transverse forces of a screw connection or for extremely precise connection of different workpieces. They are also efficient fasteners, because their design eliminates the need to combine spring pins and traditional screws.

Standards

• DIN 609
• DIN 610

Hexagon head bolts are suitable for a wide range of applications Their head shape allows the use of different tools for tightening and loosening, even in fixtures with limited space. It also enables greater torque to be transferred to the screw connection.

Standards

• DIN 6921, similar to EN 1665
• DIN 931, similar to ISO 4014
• DIN 933, similar to ISO 4017
• DIN 960, similar to ISO 8765
• DIN 961, similar to ISO 8676
• ISO 4014, similar to DIN 931
• ISO 4017, similar to DIN 933

In such cases, screw locking components are used to prevent screw connections from working loose or even coming apart completely due to loosening or loss of pre-tensioning force. Based on the way they work, the individual measures and the self-locking screws are divided into three groups: setting locks, locking devices and anti-rotation locks.

In addition, a chemical coating can be used to add an adhesive or clamping element.

Standards

• B158
• B151
• B53085
• B7500 D (EE)
• DIN EN 1665
• DIN 962

Hexagon head screw plugs are used to seal unused or open holes with a thread. This can be a permanent or temporary measure. Holes on vehicles for oil drainage, for example, can be sealed using locking screws.

Standards

• DIN 910
• DIN 7604