The thread counter or reed gauge is a measuring instrument for determining the pitch of a thread.

The assortment consists of a series of thin metal foils on each of which the pitch is stamped.

The gas thread is among the most common threading systems, it is a very fine pitch Whitworth thread, used for joining pipes.

Characteristics: 

- Thread: metric 60°, Whitworth 55°, Gas

- Blades: 58 

- From... to...: Pitch 62 - 4 / 0,25 - 6,0 / 28 - 8

- All steel

- Milled spokes and teeth