Know your fittings

[misterouija]

Here is a cut and Paste from our club site:


NTP Fittings

These fittings have normal pipe thread. You can see that the tread is tapered on this type of fitting. The tapered end allows the fitting to seal tightly. Teflon tape can be used to seal this type of fitting. Make sure that when using the teflon tape that you skip the first couple of threads. Skipping a few threads prevents debris from being introduced into the hydraulic system.

 

BOSS or SAE Fittings

A boss fitting is not to common on most standard hydraulic setups. BOSS fittings are used on some dumps, check valves and slowdown valves. Teflon tape is not needed because these fitting seal with an O-ring. When using these fittings make sure the O-ring is under the fitting when it is tightened down. You should not see any of the O-ring when the fitting is cranked down.

 

JIC 37 Fittings

JIC 37 fittings are used on most fittings that lead to a hose. Do not over tighten a JIC 37 fitting as it will strip very easily. This type of fitting is self sealing so teflon tape under no circumstances should be used.

 

Sizing of lines and fittings

#2 = 1/8"

#4 = 1/4"

#6 = 3/8"

#8 = 1/2"

#10 = 5/8"

#12 = 3/4"