|Brass SAE male elbows for NSR tubing.|
These are perfect for your brakes. You do not need a ferrel for the 3/16 size. Do not over tighten and they will work great.
These do not work with the nylaflow tubing for 3/16 size. There is no tubing insert so theres nothing for the sleeve and nut to compress onto. If you installed these as-in, your tubing will collapse and leak. None of the SAE fittings in 3/16 size have inserts, not just these male elbows. This makes them all unusable. Interestingly the 1/4 size fittings have the inserts and work just fine. I came back to Aircraft Spruce to see if they just forgot to include the inserts, but was told inserts are not supplied with the fittings from their supplier. Pretty frustrating.
The fittings have pipe thread on one end and a compression nut for the tube on the other end.