Tubing Connector Fittings, High Pressure, 1/16th, SS, Hex Heads, Medium Length 10-32 Threads. Ferrules sold separately. ARE-Applied Research brand. Additional Info: These "Male Nuts" are used to connect Stainless Steel tubing in the high pressures zones of HPLC systems. This 316L stainless steel Fitting has a standard diameter, Hexagonal Head for wrenching the nut. The medium thread length makes this Nut ideal for use on injectors such as the Rheodyne™ and others, where space is limited. Use with Single Cone Stainless Steel Ferrules which are designed to work with this fitting, providing a permanent attachment to SS tubing for a high pressure connection.