Danfoss (Weatherhead)

Self-Align Brass Union

Typical Application: Instrumentation, hydraulic and pneumatic systems.
Pressure: Working pressure up to 2000 psi with a 4:1 safety factor depending on tube size.
Vibration: Good resistance—use long nut when greater vibration resistance is needed.
Temperature Range: –65°F to +250°F range at maximum operating pressures. (Refer to tubing temperature range.)
Material: CA360 Brass.
Used With: Aluminum, copper and Weatherhead plastic tubing. Plastic tubing, except for PT230, requires 2030X insert. Not recommended for steel tubing.
Advantages: Self-aligning—no need to disassemble fitting to line up sleeve on tube. Low cost, easy to assemble, no flaring. Available with long or short nut. Broad selection of styles and sizes.

Part Number
TUBE O.D.
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HEX
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I.D.
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621X2
1/8
5/16
.094
621X3
3/16
3/8
.125
621X4
1/4
7/16
.188
621X5
5/16
1/2
.250
621X6
3/8
9/16
.312
621X8
1/2
11/16
.406
621X10
5/8
13/16
.500

Assembly with long nut 1621X

•Assembly Instructions 1. Cut tubing to desired length. 2. Slide nut and then sleeve on tube. Thread end of nut “A” and small end of sleeve “B” must face toward fitting. 3. Insert tubing into fitting body. Be sure tubing is bottomed on fitting shoulder. 4. Lubricate threads and assemble nut to fitting body. 5. Tighten with wrench to the “ring grip” point. a. Ring Grip is the point when the cutting edge of the sleeve grips the tube. This is determined by turning tube slowly but firmly by hand while tightening the nut with a wrench until tube can no longer be turned by hand and a sharp increase in torque is noticed. Label Set: CL-500 (non-adhesive)