8mm (M5) x 18mm Extractable Dowel Pin, Metric, Hardened & Ground Steel, Self-Colour, DIN 7979D

Dowel pins with internal thread for easy removal

Hardwearing extractable dowel pin, a precision-engineered pin ideal for accurate positioning and locating of parts. Primarily used in mould making, jigs, fixtures, and machinery.

Manufactured from hardened and ground alloy steel, these dowel pins offer exceptional dimensional accuracy, wear resistance, and long-term reliability.

Unlike standard dowel pins, the extractable dowels are designed with an internal threaded hole. This allows easy removal using a screw or extraction tool.

This makes the dowel pin ideal for situations where periodic maintenance and dismantling is required, along with easy replacement of the dowel if needed.

Extractible dowel pin key features & benefits

• Precision ground for accurate location - These dowel pins are manufactured to extremely tight tolerances, ensuring precise positioning and repeatable assembly alignment.
  
• Hardened alloy steel construction - Manufactured from hardened alloy steel and precision ground to specification.
  
• Internal thread for easy extraction - Manufactured with a threaded extraction hole for easy removal using a screw or extraction tool.
  
• DIN 7979D Standard Compliance - Manufactured in accordance with DIN 7979D specifications.
  
• m6 Tolerance Fit - DIN 7979D extractable dowel pins are typically supplied with an m6 interference fit tolerance, providing secure and accurate location within reamed holes.
  

Extractable dowel pins technical specifications

• Diameter (D): 8mm
  
• Internal thread diameter (TD): M5
  
• Length (L): 18mm
  
  • (C) 2.6mm
    
• Internal thread depth (ITD): 8mm min
  
• Material: Hardened & ground alloy steel
  
• Hardness: Approx. HRC 57-63
  
• Tolerance: m6
  
• Feature: Internal threaded extraction hole
  
• Finish: Precision ground
  
• Application: Alignment & location

Extractable Dowel Pins Frequently Asked Questions

What is an extractable dowel pin?

An extractable dowel pin is a locating pin that includes an internal threaded hole, allowing easy removal using a screw or extraction tool.

What is the difference between DIN 7979D and a standard dowel pin?

A standard dowel pin is usually solid with no extraction feature, whereas extractible dowel pins are manufactured with an internal thread.

What are extractable dowel pins used for?

Extractible dowl pins are used for accurately locating and aligning components within machinery, tooling, jigs, fixtures, and precision engineering assemblies.

Why are dowel pins hardened and ground?

Hardening improves wear resistance and strength, while precision grinding ensures accurate dimensions and tight tolerances for reliable alignment.

What does m6 tolerance mean?

The m6 tolerance creates an interference fit, allowing the dowel pin to be securely installed into a correctly sized reamed hole for precise location.

How are extractable dowel pins removed?

A suitable screw or extraction tool is threaded into the internal threaded hole, allowing the pin to be pulled out without damaging surrounding components.

Are DIN 7979D dowel pins reusable?

In many applications, yes, provided they have not been damaged during removal and still meet tolerance requirements, they can often be reused. 

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