SPEEDWOX 10PCS Brass Coupling 1/4" x 1/4" NPT Metals Brass Pipe Fitting Female Coupler Hex Head Pipe Fitting Air Hose Adapter Fittings for Water, Oil, Fuel, Grease and Liquefied Petroleum Gas

["【WHAT YOU GET】This set includes 10 1/4-inch NPT x 1/4-inch NPT female threaded fittings, ideal for connecting two pipes of equal diameter in a straight line.","【MATERIAL】The fittings are made of high-quality solid brass, featuring low magnetic permeability and high-temperature ductility, ensuring durability and a long service life even under harsh conditions such as high pressure and high temperatures.","【PRECISION THREADS】Both ends feature 1/4-inch NPT female threads. The precision-machined threads are smooth and deep, providing superior engagement and a tight seal. The high-quality thread design effectively prevents slippage, ensuring leak-free, safe, and reliable connections every time.","【HEXAGONAL DESIGN】Featuring an equal-diameter hexagonal fitting design, the central hexagonal section allows for easy tightening with a wrench, ensuring a secure and stable installation. Whether for pipe extensions or hydraulic line connections, it provides a strong, leak-free seal.","【WIDE APPLICATION】Suitable for various media including water, oil, fuel, grease, LPG, and natural gas, it is widely used in refrigeration systems, instrument connections, pneumatic tools, and hydraulic systems in low- and medium-pressure piping. It is the ideal tool for both DIY enthusiasts and professional plumbers."]