G means Gang (or Gänge in plural), not in English but in German! Gang is the same as your TPI. So 13G means 13 turns (Gänge), same as 13 TPI. Maybe the gauge was made in Germany.
Then, what do thread size numbers mean?
Diameter: the larger the number, the larger the screw or bolt. Threads per Inch: the larger the number, the more fine the thread. Length: the larger the number, the longer the screw or bolt.
In this way, how many threads per inch does a 7/16 NF have? UNF – Unified National Fine Threads
| Major Diameter (in) | Threads per inch (tpi) | Pitch (mm) |
|---|---|---|
| 7/16” – 20 | 20 | 1.270 |
| 1/2″ – 20 | 20 | 1.270 |
| 9/16″ – 18 | 18 | 1.411 |
Considering this, how do you read thread size?
How to Read Screw Sizes
- Read the first letter of the size. This the largest diameter: the measurement of the screw on the thread. …
- Read the second number. This is either the number of threads per unit of the distance between threads; also known as the “thread pitch”. …
- Read the third number, generally the one following the “x.”
What gauge is 3/16 of an inch?
15 U.S. Code § 206. Standard gauge for sheet and plate iron and steel
| Number of gauge | Approximate thickness in fractions of an inch | Approximate thickness in decimal parts of an inch |
|---|---|---|
| 6 | 13/64 | .203125 |
| 7 | 3/16 | .1875 |
| 8 | 11/64 | .171875 |
| 9 | 5/32 | .15625 |
What are the different thread sizes?
Common Industrial Sewing Thread Sizes
| Thread Type | Tex Size | Yarn Construction (Denier x Ply) |
|---|---|---|
| Nylon | T-600 | 1680 X 3 |
| T-700 | 1890 X 3 | |
| Polyester | T-70 | 220 X 3 |
| T-90 | 220 X 4 |
What size is gutermann thread?
50/3
What thread is 12 TPI?
1. 12-UN – Unified Extra Fine Thread, which is used for special purposes. The flank angle is 60°.
What does a 1/4 20 screw mean?
20 threads per inch
What is standard thread size?
Standard Thread Pitch Chart
| Coarse Thread Series – UNC | Fine Thread Series – UNF | |
|---|---|---|
| Nominal Size and Threads Per In. | Basic Pitch Dia. | Nominal Size and Threads Per In. |
| 3?8 – 16 | 0.3344 | 3?8 – 24 |
| 7?16 – 14 | 0.3911 | 7?16 – 20 |
| 1?2 – 13 | 0.45 | 1?2 – 20 |
