Thread gauge

Hello all

I bought some thread gauges at boot sale
can someone explain why some have

numbers & letters on ie 13g

& some just have numbers are the ones with numbers

for thread pitch

thanks

Steve

Measure and work out the pitch to see if that is what they indicate?

From the net:

“What are the different types of thread gauges?

Thread gages can be one of any number of types of gages. These in clued plug, ring, 3-wire, micrometer, tri-roll comparator, measuring wire, screw thread insert (STI), and thread gaging roll thread gages.

What type are yours?”

The German word for ‘thread pitch’ is:

Gewindesteigung

MichaelG.

A bit more detail would help people to help you, but 13g could possibly be "13 gauge" which would be the thread on the end of a particular diameter of wheel spoke. My 1938 tandem used 13g spokes.

George

13G usually means 13 threads per inch.

It is the metric way of describing TPI without referring to the verboten inch. As MG says, it stands for the German word for thread pitch. Older imperial thread gauges just have the number, indicating TPI.

I am glad someone asked this question as I have some the same & had no idea what it meant.

Steve.

H Milly S, this 13G? thread may also have answers for you.

Regards Nick.

Good morning all

i would just like to say thanks for all your advice

i now know what the G is for

& I hope it’s helped others

cheers

steve