This inline union carries an AN3 male flare on one end and an AN3 female swivel on the other, with a 1/8″ NPT female branch machined into the body. It drops straight into an existing AN3 run so you can add a pressure sender, warning switch or gauge take-off without cutting and re-making hoses. AN3 is the smallest common size, so it suits brake gauge tapping, clutch lines and low-volume signal or vacuum plumbing rather than main feed lines. The AN ends use the standard 37-degree flare seat and mate with any AN hose end or adapter of the same size. Fit the sender to the NPT port with a suitable thread sealant before assembling the union into the line.