Boshart BF-40 Forged Flare Nut...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1.41
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Boshart BF-40 Forged Flare Nut Fitting for Gas & Fuel Applications

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Model: BF-40-06

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

$1.41
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Boshart BF-40 Forged Flare Nut Fitting for Gas & Fuel Applications

The Boshart BF-40 is a short forged flare nut fitting designed for gas and fuel applications, as well as general plumbing and heating installations handling gas, oil, air, and water. Available in 3/8" and 1/2" sizes, this forged flare nut is built specifically for the demands of gas and fuel lines, distinguishing it from lighter-duty flare fittings on the market. Its forged construction is compatible with aluminum, brass, copper, and steel tubing, making the BF-40 a versatile choice for rough-in plumbers and mechanical contractors who work across multiple tubing materials on a single job site. Flare fittings of this style are designed to be disassembled and reassembled repeatedly without compromising the seal, which is a key advantage for service work, maintenance access, and future line modifications behind a wall or under a floor.

Key Features

  • Trade Size Range: Offered in 3/8" and 1/2" sizes to match common gas, fuel, and mechanical tubing runs.
  • Forged Construction: The BF-40 is a forged flare nut, built specifically for use on gas and fuel applications where a robust, durable fitting is required.
  • Flare Connection Type: Standard flare-style connection allows the nut to be disassembled and reassembled multiple times without affecting the integrity of the seal.
  • Multi-Material Compatibility: Suitable for use with aluminum, brass, copper, and steel tubing, giving installers flexibility when transitioning between tubing types on a single run.
  • Multi-Application Use: Applicable in plumbing and heating systems carrying gas, oil, air, and water, making it a practical stock item for both fuel-line and general mechanical work.
  • Contractor Pack: Supplied 25 each per package across both available sizes, suited to stocking trucks and rough-in crews that need on-hand quantities for repeated flare connections.

Technical Specifications

  • Size Options: 3/8", 1/2"
  • Country of Origin: China
  • Packaging: 25 ea
  • Prop 65 Warning: Lead

Typical Applications

  • Gas and Fuel Line Rough-In Connections
  • Residential and Commercial Heating System Installations
  • Compressed Air Line Fittings
  • Water Line Flare Connections
  • Service and Repair Work Requiring Repeated Disconnection

Why Boshart?

Boshart supplies forged flare fittings built for the repeated make-and-break demands of gas, fuel, and mechanical piping work. The BF-40's forged construction and broad tubing compatibility make it a dependable choice for plumbers and contractors who need a flare nut that holds its seal through multiple service visits, whether working in 3/8" or 1/2" sizes. Stocked in contractor-friendly 25-count packaging, it's a practical addition to any rough-in or service truck inventory.

Manufacturer Resources

Product Specs

Prop 65 Warning:
Lead
list_batch:
BOS-20260923
Product Type:
Flare Nut Fitting
Connection Type:
Flare
Department:
Plumbing
Product Subgroup:
Fittings
Product Material:
Forged Brass
Product Group:
Plumbing Fittings

Boshart BF-40-06 – Frequently Asked Questions

1) Can the Boshart BF-40 flare nut be used on a gas line?
Yes. The BF-40 is a short forged flare nut made for gas and fuel applications, and it also covers general plumbing and heating work carrying gas, oil, air, and water. The flare connection seals metal to metal, so no thread sealant is involved on the flare face itself.
2) What sizes does the BF-40 flare nut come in, and what are the part numbers?
Two sizes: 3/8 inch (BF-40-06) and 1/2 inch (BF-40-08). Both are the same short forged flare nut, just sized to the tubing run.
3) Will a Boshart BF-40 flare nut work on soft copper and on steel tubing?
It works with aluminum, brass, copper, and steel tubing. That matters if you're transitioning tubing materials on one run, you don't need a different nut for each. The tube still has to be properly flared to 45 degree SAE flare form for the nut to seat.
4) Does the Boshart BF-40 carry a Prop 65 warning?
Yes, a California Prop 65 warning for lead applies to the BF-40 forged brass flare nut. Institutional and government buyers who need lead-free brass for potable water should specify a lead-free fitting instead, this one carries the lead warning.
5) What is the BF-40 flare nut made of?
Forged brass. Forging is the reason this nut is specified for fuel and gas duty rather than the lighter flare nuts sold for appliance connectors, it takes repeated wrenching without distorting the hex.
6) Can a flare nut be taken apart and reused, or do I need a new one each service call?
Flare connections of this style are made to be disassembled and reassembled repeatedly without affecting the seal, which is the main reason they get used where a line may need to be broken later for service or modification. That's a practical advantage over a soldered or compression joint buried behind a wall.
7) How many flare nuts come in a pack of the Boshart BF-40?
25 each per package, in both the 3/8 inch and 1/2 inch sizes. It's a contractor-count pack, so plan quantities in multiples of 25 rather than per fitting.
8) Where is the Boshart BF-40 manufactured?
China. Worth knowing up front if you're on a job with domestic-sourcing requirements on mechanical components.
How fast can I get the Boshart BF-40-06 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-40-06 come with a warranty?
Absolutely. The Boshart BF-40-06 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-40-06?
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-40-06 from ZenSupply?
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