An Fitting Torque Chart

A random sample of new and used an365 4 and 5 nuts shows that the torque required to turn an4 1 4 nuts varied between 15 19 in lbs.

An fitting torque chart. These torque values apply to an connections only not flared tube or compression fittings. Good seal but prevents damage to the fitting by over torque. O ring face seal fittings. Their manual says minimum torque 140 and max 195.

Fitting until the front ferrule seats against the fitting body. Rotate the nut finger tight. When using aluminum and steel fittings use the torque for the aluminum fitting. This an fittings torque value chart was assembled by our friends in summit racing s.

Mark the nut at the 6 o clock position. Torque specification guidelines nut minimum maximum size 1torque torque1 02 50 80 03 70 105 04 100 140 05 130 180 06 150 195 08 270 350 10 360 430 12 460 550 16 700 840 20 850 1020 24 900 1080 32 1800 2000 1torque values are shown in inch pounds for aluminum fittings. Avoid dry assembly whenever possible. Standard maintenance practice dictates that mechanics add this value to the specified torque.

Not too much or you can cause damage to the fitting but snug. Use the swagelok mhsu gap inspection gauge to ensure that the fitting has been tightened sufficiently. Tightening torques are for steel fittings assembled in steel components. Torque o ring face seal fittings can and should be torqued to the recommended specifications.

Tightening bite type fittings requires counting the number of flats after first encountering wrench resistance. The flats method is slower than the torque method but it has the 2 advantages described earlier namely circumvention of plating differences and a quick visual check for proper joint tightening. Table s2 assembly torques for iso 1179 1 din 3852 2 port. I assume i d crank it more until i hit at least the 140 mark.

I m doing leak tests and put 100 in lbs on the fittings and they don t leak. These fittings don t require a lot of torque to seal properly. For best results torque to the low end of the torque range. If it leaks tighten it until the leak stops without exceeding the max torque.

While holding the fitting body steady tighten the nut one half turn to the 12 o clock position. With proper tube flare alignment with the nose of the fitting tighten the nut to appropriate torque value. Lightly lubricate the threads and sealing surfaces with oil before assembly. For brass and other soft metals decrease torque value by 35.

For best results torque to the low end of the torque range. If it leaks tighten it until the leak stops without exceeding the max torque. Go to at least the minimum stated. No thread sealent on an fittings torque is snug just use your wrench on it and give it a bit of a tighten.

Same question for my 4 fuel pressure line and 8 oil cooler lines i e. This is because the connection seal is made by an elastomeric seal against metal. I have aeroquip aluminum 6 hose ends for my fuel lines.