What does "AN" stand for?
Are they like "flare" fittings that you see in the hardware store?
Phil

'AN' stands for army/navy. This is also the equivalent to'MS' for Military Standard. In other words they are government standards for material.

Phil,

>>Are they like "flare" fittings that you see in the hardware store?<<

No. AN fittings have an angle of 37 degrees, hardware store store stuff is 45 deg.

Tom

"No. AN fittings have an angle of 37 degrees, hardware store store stuff is 45 deg".

This is one way to insure the government pays more for a simple item.

Pat,

37 gives a tighter seal at the same wrench torque. This can be a factor where pressures are high. Aluminum threads really aren't worth a s**t.

Tom