Boshart BF-42R-0806 1/2" x 3/8...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2.55
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Boshart BF-42R-0806 1/2" x 3/8" Reducing Flare Union Coupling

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Model: BF-42R-0806

In Stock (leaves warehouse same day if ordered before 3pm ET)

$2.55
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Boshart BF-42R-0806 1/2" x 3/8" Reducing Flare Union Coupling

The Boshart BF-42R-0806 is a 1/2" x 3/8" reducing flare union coupling designed for rough-in plumbing and heating installations where two different tubing sizes need to be joined with a reliable, reusable mechanical connection. Flare fittings of this type are suitable for gas, oil, air, and water lines and are compatible with aluminum, brass, copper, and steel tubing, making this coupling a versatile choice for plumbers and mechanical contractors working across multiple trades. Because the flare connection method relies on a mechanical seal rather than solvent or solder, this union coupling can be disassembled and reassembled many times without degrading the seal, which is a major advantage for service work, equipment swaps, and any application where future access to the line is likely. Supplied in bulk quantities for professional and distributor use, this coupling is manufactured in China and packaged 25 pieces to a case for efficient stocking on trucks and in supply houses.

Key Features

  • Trade Size: 1/2" x 3/8" reducing configuration allows two different tubing sizes to be joined in a single fitting.
  • Flare Connection: Mechanical flare-type union coupling suitable for gas, oil, air, and water applications.
  • Tubing Compatibility: Works with aluminum, brass, copper, and steel tubing, covering a broad range of common rough-in materials.
  • Reusable Seal: Can be disassembled and reassembled many times with no effect on the seal, ideal for serviceable connections.
  • Union Design: Allows for easy connection and disconnection of tubing runs without cutting or re-fitting the line.
  • Bulk Packaging: Supplied 25 pieces per package for contractors and distributors stocking rough-in inventory.

Technical Specifications

  • Country of Origin: China
  • Packaging: 25 ea
  • Trade Size: 1/2" x 3/8"
  • Connection Type: Flare Union

Typical Applications

  • Residential and Commercial Gas Line Connections
  • Oil and Fuel Line Tubing Joints
  • Compressed Air Tubing Runs
  • Water Supply Tubing Transitions
  • Rough-In Plumbing and Heating Installations
  • Service and Maintenance Work Requiring Repeated Disassembly

Why Boshart?

Boshart flare fittings are built to deliver a dependable mechanical seal that stands up to repeated disassembly and reassembly, giving plumbers and mechanical contractors a serviceable connection point that doesn't need to be cut and re-fit every time access is required. With compatibility across aluminum, brass, copper, and steel tubing and suitability for gas, oil, air, and water applications, this reducing union coupling is a practical addition to any rough-in inventory. Boshart supplies this coupling in bulk 25-piece packaging to keep supply houses and trucks stocked for high-volume trade use.

Manufacturer Resources

Product Specs

list_batch:
BOS-20260923
Product Type:
Union Coupling
Connection Type:
Flare
Department:
Plumbing
Product Subgroup:
Fittings and Valves
Product Size:
1/2" x 3/8"
Product Group:
Fitting

Boshart BF-42R-0806 – Frequently Asked Questions

1) Will the Boshart BF-42R-0806 flare union join 1/2 inch tubing to 3/8 inch tubing?
That's exactly what it's for. The BF-42R-0806 is a reducing flare union coupling sized 1/2 inch by 3/8 inch, so it takes a flared 1/2 inch tube on one end and a flared 3/8 inch tube on the other. Both ends are flare, not threaded pipe or solder, so each tube has to be flared with a flaring tool before assembly.
2) Can I use a flare union like the Boshart BF-42R-0806 on a gas line?
Yes. This flare union coupling is suited to gas, oil, air, and water lines. Flare connections are common on fuel gas and oil tubing because the seal is metal-to-metal and mechanical, so there is no solder or solvent joint in the line.
3) What tubing materials will a Boshart flare union coupling seal against?
The BF-42R-0806 works with aluminum, brass, copper, and steel tubing. What matters is that the tube can hold a clean flare, which those four materials will. It is not intended for plastic tubing.
4) Can a flare union be taken apart and put back together, or is it a one-time joint like solder?
It can come apart repeatedly. The flare seal is mechanical, so the BF-42R-0806 can be disassembled and reassembled many times without degrading the seal. That is the reason to use a union here instead of a soldered or solvent coupling: you can break the line for equipment swaps or service without cutting tubing.
5) How many pieces come in a pack of Boshart BF-42R-0806 couplings?
They ship 25 pieces per package. It's bulk trade packaging meant for stocking a truck or a supply house shelf, not a single-fitting retail pack, so plan the order in multiples of 25.
6) Should I use a flare union or a compression coupling to transition 1/2 inch to 3/8 inch tubing?
Use flare, like the BF-42R-0806, when the line carries gas, oil, or compressed air, or when you expect to break the joint again later. Flare gives a metal-to-metal seal that survives repeated disassembly. Compression is easier because the tube needs no flaring, but a compression ring is generally a single-set joint and is not the right pick for fuel gas. Flare costs you the extra step of flaring both tube ends with a flaring tool.
7) What is the exact part number and country of origin on the Boshart 1/2 x 3/8 reducing flare union?
The manufacturer part number is BF-42R-0806, a Boshart 1/2 inch by 3/8 inch reducing flare union coupling, made in China. That MPN is the one to quote for a straight reorder, since Boshart's flare line runs to many size combinations.
How fast can I get the Boshart BF-42R-0806 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Boshart BF-42R-0806 come with a warranty?
Absolutely. The Boshart BF-42R-0806 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Boshart BF-42R-0806?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Boshart BF-42R-0806 from ZenSupply?
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