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  1. Böllhoff China
  2. Products
  3. DIN and standard parts
  4. Screws with external driving feature

DIN and standard parts

Screws with external driving feature

In the case of screws with external driving feature, the tool is applied to the outside of the head.

Hexagon head bolt – DIN 931.

Transfer of higher torques to the drive geometry

The most common head shape for these screws is a hexagon, but other shapes are also available (e.g. square heads).

Method and principle

Overview of screws with external driving feature

Working principle

A form fit between the screw geometry and the drive tool transfers the assembly torque to the screw and enables it to be screwed in.


In addition to steel with different coating systems, available materials include stainless steel, brass and plastic.


Our products can be coated with different surface finishes depending on requirements and application. We will be pleased to give you individual advice on the right coating system.

We offer the following surfaces as standard:

  • Plain
  • Zinc plateed (industry standard)
  • VZD (zinc plated with thick layer passivation)
  • Zinc-nickel
  • Zinc flake

Find the right solution for your application

Types of screws with external driving feature

  • Thread-rolling screws for metals

    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.


    • DIN 7500 D 
  • Tapping screws

    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.


    • DIN 7976, similar to ISO 1479
    • DIN 7504 K, similar to ISO 15480
  • Hexagon fitted bolts

    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.


    • DIN 609
    • DIN 610
  • Hexagon head bolts

    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.


    • 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
  • Self-locking screws

    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.


    • B158
    • B151
    • B53085
    • B7500 D (EE)
    • DIN EN 1665
    • DIN 962
  • Hexagon head screw plugs

    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.


    • DIN 910
    • DIN 7604

Information and more


Interested in screws with external driving feature? Please download further information here.