ZKZXBrass Compression Tube Pipe Fitting Connector, Straight Coupling Adapter, 3/8" Tube OD x 1/4" NPT Male Connector 5pcs (3/8" OD Compression x 1/4" NPT Male)

The right item on time

Just what I needed

fit great and worked well

Body of fitting did not fit compression ferrule. folded three ferrules because they would not go in to fitting while being tightened. I went to my local hardware store and purchased new fittings and they worked fine no leaks! I hope someone had a better experience with this product than I did. The remaining fittings are paper weights now!

The hex nut only goes on the 3/8" copper pipe with great difficulty. Then the crush ring slides on OK. The problem is the nut never tightens up. Keep cranking expecting it to tighten up like normal with the crush ring bottoming out and the hex nut splits. Replace both the hex nut and a new crush ring of another brand and the hex hut tightens up in under 1 revolution. Poor Chinese quality again!

2 were missing sleeves and 1 had 5/16 sleeves in it and they are 3/8 compression fittings so I got 2 good ones out of a 5 pack

no ferrule to support the crush sleeve, nut and sleeve will not fit over tubing, these fittings are junk and that opinion is formed from using these type fittings for 40 years in both aircraft and truck/trailer/fleet maint.

The ferrules were too thin and too loose on the tubing. The nuts were too loose on the threads and too loose on the tubing. A seal was impossible.