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What are the Weird Phillips Head Screws in My Electrical Devices?

If you have been working with electrical devices such as circuit breakers and contactors you may have noticed that the Phillips head screws are a little different and that your Phillips drivers fit even worse than normal.

 

If your “Phillips” head screws have four small lines radiating out between the normal cross slots those are POZIDRIV® screws.

POZIDRIV® was created in 1962 but over the last several years has become more popular with automatic assembly due to increased torque capacity and less potential for cam out compared to Phillips head.

 

There are six sizes ranging from 0-5 and designated PZ0, PZ1 – PZ5. The ANSI designation is “Type IA” and the ISO is “Type Z”.

 

Although not optimal, you can use a Phillip head screwdriver in a POZIDRIV® fastener. For improved performance and less cam out, adding a few POZIDRIV® drivers or bits to your toolbox might be just what you need.

 

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Allied Automation is an Indianapolis-based leader in technology-based manufacturing solutions. Since 1981 we’ve been committed to the cutting edge, partnering with world-class brands to offer the best products and systems around. We’re ready to help you make a difference.

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