M2 Internal Fine Tooth Shakeproof Locking Washer A2 (304) Stainless Steel, DIN 6798J

Corrosion resistant internal locking washer

Internal locking washer designed for a secure, vibration-resistant fastening for industrial and engineering applications.

A washer that features multiple internal teeth that bite into the underside of a fastener creating a secure grip that helps prevent loosening from vibration. 

Internal fine-tooth washers offer a more of an aesthetically pleasing finish than the external tooth variety and are ideal where the grip on the fastener shaft is needed, though they generally have a slightly smaller bite area compared with external teeth washers.

This shakeproof locking washer conforms to DIN 6798J and are manufactured from A2 stainless steel for high corrosion resistance. This makes them ideal for both internal and external conditions.

A versatile serrated locking washer used by both DIY enthusiasts and professional alike for numerous applications. These include mechanical, electrical, automotive, and general industrial use. 

Locking washer key benefits

• Anti-Loosening Design: Internal serrated teeth provide reliable locking action.
• Corrosion resistant: A2 (304) grade stainless steel that offers strong corrosion resistance, great for indoor and outdoor environments.
• Standardised quality: Manufactured to DIN 6798J standards.
• Versatile: Perfect for assemblies facing vibration, motion or temperature changes.
  

Locking washer specifications

• Size (TD): To fit M2 - 2mm
• Internal diameter (ID): 2.34mm max
• External diameter (ED): 4.50mm max
• Washer thickness (WT): 0.3mm
• Washer thickness including serrations (WT1): 0.9mm
• Number of teeth: 7
• Material: A2 Stainless Steel
• Finish: Natural stainless
• Teeth Type: Internal serrated / tooth
  

FAQs about internal tooth shakeproof locking washer

What is an internal tooth washer and how does it work?

Internal tooth washers are serrated locking washers with inward-facing teeth that grip the fastener shaft to resist loosening from vibration.

Are internal tooth washers better than external tooth washers?

Internal tooth washers offer a more aesthetically pleasing finish and are ideal where the grip on the fastener shaft is needed, though they generally have a slightly smaller bite area compared with external teeth. 

What does A2 stainless steel mean?

A2 stainless steel refers to the commonly used 304 grade steel that offers good corrosion resistance and mechanical strength for general-purpose and outdoor applications. 

Can these tooth lock washers be reused?

Although they can be removed and inspected, reuse is not recommended if the teeth are deformed.

How do I choose the right size?

Match the washer to the thread size of the bolt or screw you’re using (e.g., M5 washer for M5 fastener) and check the internal/outer diameters on this product page.

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