Technical · 3 min read
PG vs metric gland threads: the difference and which to choose
In short
PG and metric are two separate thread standards for cable glands, and they do not fit each other. New designs use metric threads; for existing enclosures with PG entries, choose a PG gland or an adapter.
Two standards, two thread profiles
PG (Panzergewinde) is an older thread standard of German origin with an 80° thread angle. Metric threads have a 60° angle and, on cable glands, a 1.5 mm pitch (M12×1.5 to M63×1.5). Because the profiles differ, PG and metric threads do not fit each other.
The same body size in both threads
| PG | Metric |
|---|---|
| Pg 7 | M12×1.5 |
| Pg 9 | M16×1.5 |
| Pg 11 | M16×1.5 |
| Pg 16 | M20×1.5 |
| Pg 21 | M25×1.5 |
| Pg 29 | M32×1.5 |
| Pg 36 | M40×1.5 |
| Pg 42 | M50×1.5 |
| Pg 48 | M63×1.5 |
Which should you choose?
- For new enclosure and machine designs, choose metric threads.
- For enclosures whose existing entries are PG, use PG glands.
- Where you need to move between the two, fit a metric–PG adapter.
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