Thread-Locking Screws
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€9.00*
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€16.90*
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€21.10*
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€23.10*
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€35.60*
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€9.65*
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€31.00*
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€14.60*
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€26.20*
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€19.20*
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€11.30*
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Available in 75 days
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Available in 75 days
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Available in 7 days
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€15.70*
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Thread-locking screws have a metric thread (M) and are treated with a special coating. This is usually polyamide and is visible as a blue spot on the thread. In some cases, the polyamide coating is also applied around the thread. The positioning of the polyamide coating is defined in accordance with DIN 267 Part 28. Thread-locking screws prevent the tightened screw connection from working itself loose. These screws are available with a clamping coating or an adhesive coating.
Typical applications for thread-locking screws
Thread-locking screws combine the positive properties of fasteners and locking elements in one product. Another advantage of this type of screw is that variants with a clamping thread lock can usually be reused several times. By contrast, screws with an adhesive coating cannot be used more than once. Therefore, thread-locking screws offer an interesting alternative to other chemical or mechanical thread-locking solutions. Thread-locking screws are used in areas where vibrations or oscillations could cause the existing screw connection to loosen. For example, screws with thread lock are commonly used in industry, window construction, renewable energy systems, wind turbines, the automotive industry, and the medical technology sector.
Thread-locking screws in the ETTINGER product range
The ETTINGER product range includes a large selection of thread-locking screws in various thread sizes and designs.
- Countersunk screw with blue poly spot as thread lock
- TUFLOK© screw with thread lock
ETTINGER stocks the following variants and more:
- Thread-locking screws with countersunk head
- Flat head screws with thread lock
- Thread-locking screws with Torx drive
- TUFLOK© screws with thread lock
Thread-locking screws in various thread sizes:
- Thread-locking screws M2
- Thread-locking screws M3
- Thread-locking screws M4

Other ETTINGER products for screw retention
- Lock nuts: Lock nuts are also known as stop nuts in the field of fastening technology. They include a polyamide ring, which deforms both plastically and elastically when penetrated by the associated screw. As a result, the lock nut provides a screw-locking effect without the need for an additional locking element. Unlike thread-locking screws, lock nuts cannot be used more than once.
- Lock washers: Lock washers are another alternative when it comes to screw locking. They can simply be slid onto the corresponding screw without requiring any tools at all.
- Hex lock nut with thread size M2
- Screw lock washer M2 ribbed on both sides
Quality from ETTINGER – your requirements are our mission
For more than 60 years we have been supplying fasteners and electromechanical components in accordance with widely recognized standards. We rely on qualified employees, strict incoming goods inspections and innovative technologies to ensure that we consistently meet our high quality standards for battery and soldering technology as well as other electromechanical accessories.
At ETTINGER, we prefer to manufacture and source our parts in Germany. Thanks to long-standing, reliable business relationships with our suppliers we now have strong partners at our side, which in turn enable us to offer you products of the highest quality.
Quality through service and expertise. When you buy components from ETTINGER, you can enjoy peace of mind and confidence in your project.
About ETTINGER
ETTINGER GmbH is based in Hofolding near Munich and has been supplying an extensive range of mechanical components for electronics production for over 60 years. Approximately 25,000 products are permanently available from stock and we can supply another 15,000 products in line with specific customer requirements. We supply many industry sectors with our precision turned parts.
- Electronics manufacturing
- Mechanical engineering
- Medical technology
- Measurement engineering
- Automotive sector and industry
- Sensor technology
- Environmental and solar technology