RectorSeal 87039 Pro-Fit 5/8" Quick Connect Socket, Push-to-Connect Refrigerant Fitting
The 87039 is the largest socket RectorSeal makes, and the largest flare connection the Pro-Fit system addresses. Above 5/8", equipment connections are brazed rather than flared, so there is no port for a socket to thread onto — which is exactly why the sockets stop here while the unions and elbows carry on to 7/8". At this diameter the fitting takes a female SAE 45° flare nut torqued to 46–59 ft-lbs on the equipment side and a 1-5/16" push-to-connect seat on the lineset side, rated to 870 psig and 250°F continuous.
Is a 5/8" Socket the Right Fitting for This Connection?
Five-eighths flare connections belong to the upper end of residential and the lower end of light commercial — three-ton ductless equipment, larger multi-zone condensers, and unitary indoor coils. Flaring 5/8" tubing by hand is the least pleasant version of that job: the tube is heavy, the flare block needs a firm grip, and the torque range that follows is the widest RectorSeal publishes. The socket removes the flaring step and leaves you with one torqued nut and one push connection.
The push end seats 1-5/16", an odd figure worth marking with the gauge rather than a tape, and the flare nut takes 46–59 ft-lbs. Support the lineset near the fitting — a 5/8" line carries enough weight that leaving it unsecured puts a steady load on both connections. Insulate over the finished joint once it is pressure-tested.
Ideal for: Three-ton ductless and light commercial equipment connections, unitary indoor coil hookups with 5/8" flare ports, installs without a flare block sized for heavy tubing, replacing a failed 5/8" field flare, and multi-head jobs where every connection has to be equally good.
Smaller connection? Drop to the RectorSeal 87038 Pro-Fit 1/2" Quick Connect Socket. Above 5/8" there is no socket — see the 87022 3/4" union for tube-to-tube work at larger diameters.
Fitting selection is based on measured tube outside diameter, the equipment connection type, and system operating conditions. Installation must be performed by an EPA 608-certified technician in accordance with RectorSeal's published instructions and applicable mechanical codes. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Fitting | 87039 — 5/8" Pro-Fit Quick Connect Socket (one fitting) |
|---|---|
| Connection Type | Push-to-Connect x Female SAE 45° Flare (5/8") |
| Body Material | Brass |
| Seal Design | Patented Double O-Ring and Grip Ring (push end), 45° Flare Seat (nut end) |
| Design Pressure | 870 psig (60 bar) |
| Continuous Operating Temperature | 250°F (121°C) |
| Insertion Depth | 1-5/16" on the push-to-connect end |
| Flare Nut Torque | 46–59 ft-lbs — largest range published |
| Approved Tubing | Copper and Coated Aluminum Linesets |
| Certification | ICC-ES PMG-1616 (UL 207, UL 1963) |
One assembled socket per unit, cased 10 per box. The 5/8" size is the top of the range covered by the 87048 Pro-Fit Support Kit (1/4"–5/8"), so that one kit covers every socket RectorSeal makes. Larger-diameter tubing and fittings are under copper lines and fittings.
Socket Fitting & Sealing Features
87039 Largest-Diameter Socket
- Largest Pro-Fit socket, matching 5/8" SAE flare ports
- Deepest push seat of any socket at 1-5/16"
- Widest published flare torque range in the line
- Factory-machined 45° flare seat inside the nut
- Patented double O-ring and grip ring on the push side
- 870 psig design pressure at maximum socket diameter
- 250°F continuous operating temperature rating
- Brass body, UV and corrosion resistant
- Sight window verifies insertion on the lineset end
- Listed on ICC-ES PMG-1616 to UL 207 and UL 1963
Three-Ton & Light Commercial Hookups
- Removes hand-flaring from the heaviest flared connection
- Push end needs no wrench and no torque
- Suits three-ton ductless and unitary indoor coils
- Delivers the same flare geometry on every connection
- Replaces a failed 5/8" field flare without recutting more line
- Covered by the same 87048 kit as the smaller sockets
- Joins to copper or coated aluminum linesets
- Releasable with the disconnect clip after pump-down
- Approved for R-22, R-32, R-134a, R-290, R-410A, R-507, R-600a
- Packaged 10 per manufacturer case
Specifications & Manuals
Product documentation includes the full Pro-Fit part number table, insertion depth and flare nut torque specifications, approved tubing and refrigerant lists, and the ICC-ES PMG product rating certificate covering the certified pressure and temperature ratings.
Frequently Asked Questions
Is the 87039 the largest Pro-Fit socket?
Yes. Sockets are made in 1/4", 3/8", 1/2" and 5/8" only. Equipment connections above 5/8" are brazed rather than flared, so there is no flare port for a larger socket to thread onto.
What insertion depth does the 5/8" socket need?
1-5/16" on the push-to-connect end — the deepest of any socket. That odd figure is worth marking with the Pro-Fit depth gauge rather than estimating off a tape measure.
What torque does the 5/8" flare nut take?
46–59 ft-lbs, the widest torque range RectorSeal publishes. Make sure the location gives you enough wrench purchase to reach it cleanly before committing to the connection.
What size systems use a 5/8" flare connection?
Typically three-ton ductless equipment, larger multi-zone condensers, and unitary indoor coils. Confirm against the equipment's installation manual rather than inferring from system tonnage.
Can the 87039 be disconnected later for service?
The push-to-connect end can be released with the Pro-Fit disconnect clip after the system has been isolated or pumped down — RectorSeal's instructions are explicit that the line must not be under charge. The flare nut end unthreads conventionally.
Does the 87039 work on coated aluminum linesets?
Yes, on the push-to-connect end — copper and coated aluminum are both approved tubing types. Bare or uncoated aluminum is not listed in RectorSeal's documentation.
Click On Links Below For Documentation:
Technical Specifications
Brochure
Product Rating Certification
