Brass Coupling 1/4 Inch NPT Female x 1/4 Inch NPT Female Hex Head Pipe Fitting, Compressor connector fnpt to fnpt Coupler, Air Hose Adapter Fittings, Thread 0.5" ID to 0.5" ID, 4 Pcs

Good quality, no burrs or other problems. Worked like a charm

Good quality. Used these to connect a tankess water heater. No leaks. Fits nicely.

Good fittings

They fit perfectly.

Doesn't seem to be a standard size - too small to fit a standard 1/2" internal pipe wrench inside. If you don't have access to tighten from outside, it won't work with a standard internal pipe wrench.

Needed this for a plumbing project and local source only had one on hand and could not tell me when they would be back in stock. Resorted to Amazon to purchase for this project. The adapters arrived very fast and were perfect for the project. They seem to be high quality brass fittings and were less expensive than our usual local source. I would buy again if/when needed for other projects.

Standard fitting, well made.

Excellent material and machining.

works great

Great quality at the right price.

as described

What can I say? They worked. Just used some teflon tape on the threads and no leaks.

Great product for the price