
| Size: | 1/4" |
|---|---|
| Material: | Carbon Steel |
| Finish: | Black |
| Application: | Accessory |
the 1/2" coupling is 1-3/4" long between the threads.
If you look at the "Submittal Sheet" under the Manuals tab on the product page, you will see a chart corresponding the coupling size with length. It seems as though the 3/8" Rod Coupling corresponds with a 1 3/4" length. Here is the direct link: http://s3.pexsupply.com/manuals/1297938049625/47881_PROD_FILE.PDF