How do I determine a coarse thread on a plastic or metal drum?

How to measure correctly

The easiest way to determine a thread is to unscrew theinsert or closureand then measure theexternal thread.

Typical measurements:

• 200-litre metal drum
  • 2" R connection:59.6 mm outside
  • 3/4" R connection:26.4 mm outside
• 200–220-litre plastic drum
  • S70x6 (Mauser insert):69.5 mm outside
  • S56x4 (TriSure insert):56.6 mm outside
• 60-litre plastic drum
  • DIN 71 external thread:72.3 mm outside

Plastic drums (208–220 litres)

The typical blue plastic drums usually have two inserts in the lid:

• S56x4 (TriSure thread)– Ø approx. 56.6 mm outside
• S70x6 (Mauser thread)– Ø approx. 69.5 mm outside

Many inserts also contain a3/4" internal threadfor accessories such as vents.

Plastic drums (60 litres)

These drums usually have aDIN 71 external threadwith72.3 mm outer diameter.

There are suitable adapters for this, e.g. "Adapter DIN 71".

Metal drums (200 litres)

Metal barrels are clearly different from plastic barrels. They typically have:

• a large connection with2" R-thread (59.6 mm outside)
• a small connection with3/4" R-thread (26.4 mm outside)