Page 223 of Fasteners and Industrial Supplies by MPI Maintenance Products

fitting measurement nta air brake fittings for nylon tubing utilizing the compression sleeve principle nta nylon tube air brake fittings provide a d.o.t approved connection when used with nta tubing the body of the fitting contains a staked-in stainless tube insert to prevent tube restriction when the nut is tightened while these fittings may be used with any plastic tubing care should be taken that the i.d of the tubing matches the insert s outside diameter use of standard air brake nylon tubing which matches perfectly is recommended and makes the only d.o.t approved connection sold complete with nuts sleeves and inserts flare fittings 45° sae flared tube fitting connections are made by slipping the nut over the tubing and flaring the end of the tubing by use of a flaring tool when used with rubber hose connections the swivel nut of the hose end provides a simple and reliable connection for air fuel and hydraulic lines the nut is pulled up with a wrench and a tight joint is obtained by sandwiching the flared tubing between the mating flare surfaces the connection can be disconnected and connected frequently these fittings can be used on low medium and high pressure lines under the most adverse conditions all flare fittings are sold less the nuts inverted flare fittings this type of fitting is similar to the flare fitting except that the flare seat is inside of the body the nut is tightened inside of the fitting making the assembly very compact these fittings can be used on low medium and high pressure work and are sold less the nuts most commonly used in the automotive industry where it is popular for fuel and hydraulic brake line assemblies poly-tite fittings a compact brass compression type fitting designed to speed and simplify plastic tubing installations the brass nut and plastic sleeve brass sleeve supplied on 1/8 and 3/16 sizes are pre-assembled the tube support is built into the fitting body on tube sizes larger than 3/16 so there is no fumbling around looking for lost components use with polyethylene polypropylene and nylon tubing for instrumentation air water lubrication fuel and coolant lines be sure the built-in insert s o.d matches the tubing s i.d a complete seal is obtained by hand tightening the nut though most mechanics feel a wrench tight fit is more realistic push-in fittings the simplicity of the push-in fitting is its primary advantage simply cut the tubing square and push the tubing into the fitting the o-ring seal will hold pressures up to that of the tubing a push on the collar releases the grip and the fitting never has to be unscrewed for new tubing to be inserted a supply of unions and tubing in a truck cab will make emergency tubing repairs quick and simple maintenance products inc · 800 523-2367 219 696-6411 223

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