Direct Assembly Screws

EJOT FDS® Flow Drilling Screw for High-Strength Sheet Metals

The EJOT FDS® (Flow Drill Screw) is a flow drilling screw for detachable high-strength sheet metal connections. It joins thin steel or aluminum sheets without pre-drilling or punching.

An EJOT FDS flow-drilling screw for detachable sheet metal connections on light grey background with the red EJOT logo in the top right corner.
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Two people discussing design of a fastener.

High-Strength Connections in Lightweight Construction and the Automotive Sector

The topic of lightweight construction is of critical importance in many industries. In the automotive sector in particular, the priority is high, because reducing energy consumption is one of the main challenges in individual transportation. At the same time, the components used must also be able to withstand high loads – the quality of the bolted joints is therefore still of central importance. This is where the advantages of the FDS® screw, which is predestined for these complex operating conditions, become apparent.

Benefits of EJOT FDS® Screws

Benefits

High-Strength

FDS® screws create a strong connection that can withstand high loads.

Benefits

The high thread-carrying capacity of the FDS® screw creates a strong connection that can transmit both high pull-out strengths and high shear loads.

Benefits

Resistant

against vibration

Benefits

The EJOT FDS® provides both a high loosening torque and vibration resistance.

Benefits

No Chip Formation

The screwing-in process of the FDS® screw is chipless.

Benefits

There is no pre-drilling or punching necessary and the resulting connection is both water- and gas-tight.

Benefits

Easy Maintenance

EJOT FDS® screws create a metric thread and are easily replaced.

Benefits

The screws are easy to dismantle and recycle. In case of a pending repair or fastener loss, they can be replaced with a conventional metric screw. Access is necessary only from one side.

Flow Drill Screw Installation Process

PS | Direct Assembly Screws | EJOT FDS
Graphic showing the six different phases of the EJOT FDS installation process, from heating of the sheet metal to penetration and through-screwing to tightening of the connection.

Sequence Phases of the FDS® Bolting Process

  1. Heating of the sheet due to pressure force and high speed
  2. Penetration of the material with the conical screw tip
  3. Forming of the cylindrical pull-through
  4. Chipless grooving of a metric jig nut thread
  5. Through-screwing
  6. Tightening of the screw with set torque

Selecting the Right Screwdriving Equipment

Flow punch forming requires a high screwdriver speed and a defined pressure force; thread-forming and screw tightening require a high torque. For the exact specification of the suitable equipment, our product team is happy to assist you. In addition, assembly tests can be carried out in the application technology laboratory at EJOT® to determine the selection criteria.

Different types of direct assembly screws on a white background.

Secure Fastening Connections

Direct Assembly Screws

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EJOT® and FDS® are registered trademarks of EJOT SE & Co. KG.