2 Pack Heavy Duty Brass Replacement Control Needle Valve 1/4" Male NPT X 1/4" Female NPT Connection

I was surprised at the quality of these. They are solid, heavy, and work. One of the two had it's adjustment knob screwed a bit tight so I had to use pliers to loosen it. Once I did that, I worked perfectly. I use these as a secondary way to shutoff and control propane flow. For that, the work as expected.

Good product and good value.

These appear to be good quality, with a restricted flow potential (needle valves tend to be low-flow). Though the male 1/4" NPT pipe threads have in internal diameter of 5/16", the internal galley hole is only ~5/32" (~.164"). The knob goes from fully closed to fully open in ~1.25 rotations. The pitch on the threads is 1.25mm (or 4 peaks in 5mm).The "needle" has an angle of ~60º, and the "seat" contact point on the valve body is a sharp 90º corner, both of which will wear into each other. Time will tell how well this seals in the off-position under pressure... my application is not too critical in terms of leakage over time, as the application these will be used in will be limited duration, and when I'm done using the scrap furnace, the air & propane pressure on the system will be shut off elsewhere.The package includes two small packs of teflon tape and four silicone o-rings.Each valve weighs ~116g/4.1oz.Made in Communist China.

I use it to control the flame level for my outdoor stove, works like a champ.

Exactly what I needed for the air valve on my homemade cold smoke generator. Real sturdy and works great at a very reasonable price.

Great for my rust tank drip line for irrigation. You can make micro adjustments and it’s durable

I used this valve to limit water usage in a whole house humidifier and it works well in this application. FNPT threading was deep enough for the fittings and clean. The nut just below the adjustment knob needs to be snug enough to allow movement but not so loose that water leaks out of the shaft. The nut can be also be used to lock the adjustment setting.

Knobs turn easy--full seal when closed.