2 PCS Brass Bulkhead Coupling Both End 1/4" NPT Female,Outer Diameter 3/4-16UNF Brass Bulk Head Pipe Fitting Bulkhead Tank Fitting Coupler Coupling,15/16" Length (Pack of 2)

Didn't know if these would work, but they work like a charm. Good quality and a value for the money. Would buy again if needed in the future.

These are quality, well made Inexpensive and good looking, fit is good just beware of sharp corners. RECCOMENDED

Perfect for solid mounting an air chuck in my engine bay for onboard air. No leaks.

Had an oil leak in my snowmobile oil tank. ordered these bulkhead couplings and used one in the tank to get rid of the grommet from the factory. No more oil leak even to this day. I have a spare if my other sled starts to leak. Great product for the money.

works exactly as described

I appreciate the thick sealing ring, making even compression to seal against the surface

Just what I needed, worked great.

They work very well, but the washers they come with are crap. They cut and shred before you even get the brass pieces remotely tight. I switched them out with some different rubber ones I had and they worked great. I used them to make 3 seperate connections through my truck bed for an on board air compressor system. Once evey thing was installed and under pressure I tested them for leaks with a lil soapy water. Not a bubble to be seen, so mission accomplished.

Very well made threads are cut perfectly. Sealing gaskets work well.

Very well made and sealed perfectly.