4PCS Hex Nipple 1" x 1" Male Pipe Fittings, 304 Stainless Steel 1 inch NPT Male Threaded Pipe Adapter Fittings Equal Nipples Connectors, MNPT Straight Connector Pipe Fitting

Installing a new water softener and pre filter. These along with the flex tubes were the only parts that didnt leak. Granted I am using these to extend the flex pipe and the pipe has rubber washers. So nearly a 0% chance for these to leak but the machining on these is WAY better then any of the other fittings I bought. Id trust these not to leak in any application.

good quality as described

Good seller and fast shipping. Exactly what I wanted, and good value!

These look great but the complaint I have is the taper is too long. Sometimes you tighten them up right to the nut and they still don't seal completely. I have had to use hydraulic sealant in some applications to get them to seal. If the female threads are not cut too deeply they work fine. The threads are smooth, cut well and the nipples to not have any sharp edges.

I purchased and used 4 of these hex nipples in 1" NPT. I found them to be very nicely made with clean threads and smooth inside and outside. They were also a good fit for the NPT female sockets that they mated to. Using tape and dope, and light to moderate tightening, there were no leaks. I found nothing needing improvement and considering the reasonable price, these rate five stars.For those that don't know, one needs to be careful when tightening two stainless parts together. Some kind of anti-seize compound is usually used on nuts and bolts to avoid galling. Given that I was plumbing potable water lines, I used some CRC food-grade anti-seize that was rated to work with stainless. It is pretty thick and goopy, much like plumber's dope. I wasn't sure if it would provide the seal, but this in combination with my favorite tape ( Oatey's FASTape ) proved to be effective. I first tested with pressurized air and bubble leak detector and every joint was good the first time. I happened to have the CRC product already, but given the excessive price might try something else before buying it for this purpose. Maybe nothing more than a conventional PTFE-based, white plumbing dope would have been fine. Just don't go medieval on the tightening as these fittings are precisely machined. And if you mix brass or copper with the stainless, the galling issues all go away.

the fittings came in and they are looking good for my pressure switch

Threads were straight cut (like electrical) not good for pressure.

Quick ship, good product.