PG Thread Pitch Chart

What is a PG Thread?

PG stands for Panzergewinde, a German thread standard originally developed for cable glands and electrical installations. PG threads are commonly used for cable entries, electrical enclosures and industrial control equipment.

PG threads use an 80° thread angle, which differs from general-purpose fastening threads. Unlike standard fastening applications, PG threads are primarily designed for cable gland applications and providing secure cable protection in demanding industrial environments.

Although newer metric cable gland standards have become more common in modern installations, PG threads are still widely found in existing electrical installations, machinery and replacement components across Australian and international industrial facilities.

Common PG Thread Sizes

PG sizing refers to the cable gland thread standard and not directly to the cable diameter. Common PG thread sizes include:

• PG7
• PG9
• PG11
• PG13.5
• PG16
• PG21
• PG29
• PG36
• PG42
• PG48

How to Read the PG Thread Chart

The PG Thread Chart above displays key dimensions for each thread size. Each column provides essential information:

• Diameter — The PG thread size designation
• TPI — Threads Per Inch, indicating thread pitch
• Drill Size (mm) — The recommended tap drill diameter for creating the thread

These dimensions are essential for selecting the correct tap, die or drill bit when working with PG cable gland threads.

Common Applications

PG threads are commonly found in a wide range of industrial and electrical applications, including:

• Electrical control panels
• Switchboards and distribution boards
• Industrial machinery and equipment
• Automation and control systems
• Motors and electrical enclosures
• Instrumentation systems
• Manufacturing equipment
• Industrial maintenance and repair work

PG vs Metric Cable Gland Threads

PG Threads originate from German engineering standards and use an 80° thread angle. They are common in older electrical equipment and installations, particularly in European and Australian industrial facilities.

Metric Cable Gland Threads represent the modern international standard and use ISO metric thread dimensions. These are increasingly used in new electrical equipment and installations.

PG and metric threads are not interchangeable. Always confirm the correct thread standard before selecting replacement components or creating new threads. Using the wrong standard can result in poor fit, cable damage or safety hazards.

Frequently Asked Questions

What does PG thread stand for?
PG stands for Panzergewinde, a German cable gland thread standard used primarily in electrical installations and industrial equipment.

What are PG threads used for?
PG threads are used for cable entries, electrical enclosures, cable glands and industrial control equipment where secure cable protection is required.

Are PG threads still used today?
Yes. Although metric cable gland standards are now more common in new equipment, PG threads remain widely used in existing installations, machinery and replacement components across industrial facilities.

Are PG threads the same as metric threads?
No. PG threads use an 80° thread angle and are based on German standards, while metric threads follow ISO standards. They are not interchangeable and require different taps, dies and tools.

How do I identify a PG cable gland thread size?
PG thread sizes are marked on the cable gland or enclosure. Refer to the PG Thread Chart above to match the size designation with the corresponding dimensions and tap drill size.