Page 309 - MidlandMetalsCatalog2010baNN

308
H
YDRAULIC
370 JIC ADAPTERS
Caution: 37-Degree flared fittings are not
designed to provide structural support for
other components.
Working Pressures
The following table lists the recommended working
pressures for steel 370 flare hydraulic tube fittings
manufactured in accordance with SAE standard J514.
Many factors such as impulsing, vibration, mechanical
shock, and overtightening may affect the integrity of the
fitting connection. For these reasons, the recommended
working pressures are actually lower than the capacity
of the fittings. SAE recommends sufficient testing to be
conducted to assure that performance levels will be safe
and satisfactory, especially if installed insystems operating
at elevated pressures or in severe conditions. When using
fittings with different size or thread type, use the lower
pressure rating of the two threads.
Materials
• Carbon Steel trivalent chrome plating
Conformance
• SAE J514
• MS51500-MS51534
• Temperature Range: -650F to +4000F
Dash Flared 4 TO 1 Minimum
Size Thread Size Burst PSI
-2 5/16-24 5000
-3 3/8-24 5000
-4 7/16-20 5000
-5 1/2-20 5000
-6 9/16-18 5000
-8 3/4-16 4500
-10 7/8-14 3500
-12 1-1/16-12 3500
-14 1-3/16-12 3000
-16 1-5/16-12 3000
-20 1-5/8-12 2500
-24 1-7/8-12 2000
-32 2-1/2-12 1500
SAE J514 37-Degree Flared fittings
pressure rating
370 FLARED FITTING
Assembly Instructions
Alternate Assembly Method
Step1. If torque method not possible, follow steps 1-3 above, then
proceed to the steps below.
Step 2. Lightly wrench tighten the nut until there is firm resistance.
Step 3. Place a wrench on wrench pad next to nut as near the 6
o’clock position as possible.
Step 4. Place second wrench on nut as near the 3 o’clock position
as possible.
Step 5. Turn nut clockwise to no less than the 4 o’clock position
and no more than the 6 o’clock position. Required rotation
generally decreases as size increases.
Recommended
Step 1.Inspect for possible contamination or damage from ship-
ping or handling. Sealing surface should be smooth. Annular
tool marks of (100uin) concentric with thread permissible.
Step2. Lubricate the threads and the entire surface of the cone
with hydraulic fluid or a light lubricant.
Step 3. Align mating components for hand connection and turn
flare nut until sealing surfaces make full contact.
Step 4. Torque nut to the values shown on the following table.
If a wrench pad is provided next to nut, place a second
wrench on pad to prevent flare from rotating while being
torqued.
Step 5. When torquing nut onto a straight flared fitting, it may
be necessary to also place a wrench on the flared fitting
wrench pad to prevent it from turning during assembly.
Dash Flared Thread Torque
Size Size Foot/Lbs.
-2 5/16-24 6-7
-3 3/8-24 6-9
-4 7/16-20 9-12
-5 1/2-20 14-15
-6 9/16-18 18-20
-8 3/4-16 27-39
-10 7/8-1/4 36-63
-12 1-1/16-12 65-88
-14 1-3/16-12 75-103
-16 1-5/16-12 85-113
-20 1-5/8-12 115-133
-24 1-7/8-12 125-167
-32 2-1/2-12 190-258
Why wet Torque?
Due to the difference in plating types and thickness,
materials, and thread quality of different components,
the coefficient of friction varies greatly on any given
assembly. Lubrication not only produces a more con-
sistent coefficient of friction, it increases clamping
force on sealing area with less torque on the threads.
Overtightening causes threads toyield, deformand lose
their ability to maintain an adequate load or clamping
forceon the seatingarea. Extendedoperationand severe
conditions cause further yieldingwhich results in leaks.
Overtightening is the single greatest cause for leaks
in metal to metal seat hydraulic connections. It is our
firm position, that to not wet torque, is to compromise
consistency and quality for convenience.
Straights Pg. 283-285
Shapes Pg. 285-290
Bulkheads Pg. 290-291
Female Swivels Pg. 304-306
O-Ring Fittings Pg. 307-312
37° JIC ADAPTERS HYDRAULIC ADAPTERS