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  1. Böllhoff China
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  4. Screws with internal driving feature

DIN and standard parts

Screws with internal driving feature

Screws with internal driving feature can be used in a wide range of applications.

Screws with internal driving feature – DIN 7985

Drive profiles

The most frequently used drive profiles are slot, cross recess, hexalobular (TORX®) and hexagon socket

These drive profiles are available in various designs and modifications. It is worth noting that cross recess drives are subdivided into the Phillips and Pozidriv drives.

Method and principle

Overview of screws with internal driving feature

Working principle

The form fit between the slot in the screw head and the drive tool transfers the installation torque to the screw enabling 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 plated (industry standard)
  • Thick-layer passivated
  • Zinc-nickel
  • Zinc flake

Find the right solution for your application

Types of screws with internal driving feature

  • Set screws

    Set screws – also called grub screws – have a thread along the entire length of the screw. This means that they can be screwed completely into the receiving material and are designed to clamp a workpiece to the end of the threaded hole. Standard set screws should therefore not be subjected to tensile loads.


    • DIN 551 identical to ISO 4766
    • DIN 553 identical to ISO 7434
    • ISO 4026 similar to DIN 913
    • ISO 4027 similar to DIN 914
    • ISO 4028 similar to DIN 915
    • ISO 4029 identical to DIN 916
    • ISO 7435, similar to DIN 417
  • Tapping screws

    The screw thread runs all the way from the tip to the head. Special types are available, such as a heavy-duty tip tapping screw, which penetrates the sheet to be joined so there is no need for prepunching. Double-thread types that take less time to screw in are also available.


    • DIN 7504 M, similar to ISO 15481
    • DIN 7504 O, similar to ISO 15482
    • DIN 7504 R, similar to ISO 15483
    • DIN 7981 C, similar to ISO 7049
    • DIN 7981 F, similar to ISO 7049
    • DIN 7982, similar to ISO 7050
    • DIN 7983, similar to ISO 7051
    • B 15481, similar to ISO 15481
    • B 15482, similar to ISO 15482
    • B 52030
  • Pressboard screws

    The core diameter is smaller than a traditional screw. This reduces the screw-in resistance while also increasing the thread overlap. The associated shear resistance to the wood material determines the pull-out strength of the screw. The countersunk head shape allows the screw to be flush with the material. These screws usually have a 40° flank angle (based on DIN 7998 ), are case-hardened, and have a slide-coated cone point.


    • B 7505
  • Screws for plastic

    Thermoplastic plastics are being used increasingly as materials. Screws for these components must achieve high-strength, long-lasting and economical connections, even under high loads.Self-tapping screws for plastic can be installed in a predrilled hole. The special thread geometry also enables thin-walled constructions. It also creates a self-locking effect which prevents the screw connections from working loose.


    • E 1452
    • E 5451
    • E 1413
    • E 1412
    • E 1411
    • E 5454
    • E 5151
    • B 52004
    • B 52005
    • B 52006
  • Pan head screws and raised countersunk head screws

    These screws are particularly suitable for use where the screw connections are visible. The rounded head shape minimises the risk of injury. Pan head screws are useful in connections where the mounting material must not be pressed in. Countersunk head screws, on the other hand, offer a finish that is flush with the workpiece. These screws can be used in a wide range of applications.


    • DIN 964, similar to ISO 2010
    • DIN 966, similar to ISO 7047
    • DIN 7985, similar to ISO 7045ISO 7380-1
  • 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 C
    • DIN 7500 C (E)
    • DIN 7500 E
    • DIN 7500 M
    • DIN 7513
    • DIN 7516
    • EJOT ALtracs® Plus E5151
  • Countersunk bolts

    Countersunk bolts are flush with the mounting material, thanks to their funnel-shaped head. This reduces the risk of injury and enables additional components to be attached. Example application areas for countersunk screws include mechanical engineering, and device and vehicle construction, as well as wooden structures.


    • DIN 963, similar to ISO 2009
    • DIN 965, similar to ISO 7046
    • DIN 7991, similar to ISO 10642
    • ISO 10642, similar to DIN 7991
  • Self locking screws

    Self locking screw components are used to prevent screw connections working loose or even coming apart completely due to 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.


    • B 50500 similar to ISO 7380
  • Cylinder screws

    Cylinder screws are particularly effective for preventing highly stressed connections from working loose in applications with restricted space. The head shape enables the screw to be countersunk in a bore hole so that it is flush with the receiving material. These screws are used in particular for machines and vehicles.


    • DIN 84, identical to ISO 1207
    • DIN 404
    • DIN 427, identical to ISO 2342
    • DIN 912, similar to ISO 4762
    • DIN 927
    • DIN 6912
    • DIN 7984
    • ISO 4762, similar to DIN 912
    • B 7984, similar to DIN 7984 and ISO 14580
  • Hexagon socket button head screws with collar

    Hexagon socket button head screws with collar have similar advantages and areas of application to pan head screws. The risk of loss of pre-tensioning force is also reduced due to the larger contact surface and lower surface pressure.


    • ISO 7380‑2
  • Socket screw plugs

    Socket screw plugs are used to seal open or unused threaded holes. This can be a permanent measure or it can be temporary, allowing the threaded hole to be used later. Holes on vehicles for oil drainage, for example, can be sealed using socket screw plugs.


    • DIN 906
    • DIN 908