Brass Flare Nut
Shipping and Delivery
Shipping and Delivery
| Product Type | Delivery Method | Preparation Time | Transport Time | Delivery Time |
|---|---|---|---|---|
| All Parts | Pickup Point | 0 to 3 days | 3 to 6 days | 3 to 9 days |
| All Parts | Home Delivery | 0 to 3 days | 3 to 5 days | 3 to 8 days |
| Tubes > 90cm | Home Delivery | 0 to 3 days | 3 to 5 days | 3 to 8 days |
| Tubes < 200cm | Home Delivery | 0 to 3 days | 3 to 5 days | 3 to 8 days |
| Tubes > 200cm | Home Delivery | 0 to 6 days | 6 to 10 days | 6 to 16 days |
| Assembled Products | Home Delivery & Pickup Point | 0 to 5 days | (see methods) | 3 to 11 days |
* Tubes longer than 90cm cannot be delivered to a pickup point
For orders of more than 50 units of the same item or more than 100 kg, restocking may exceptionally extend the delivery time by up to 10 working days.
For confirmation of delivery times on specific items, please send us a message
Brass Flare Nut
Brass flare nut for connecting copper tubes to threaded fittings. This nut is used with a copper tube whose end has been flared to create a leak-tight mechanical joint. ISO 228-1 BSPP thread.
Description of the Brass Flare Nut
This flare nut screws onto a male fitting and presses the flare (flared end) of a copper tube against the seat of the fitting. This system creates a reliable, removable mechanical seal, without soldering or brazing.
Each reference combines a thread (matching the fitting) and a tube diameter (matching the copper tube to be connected). Check the compatibility between the thread of your fitting and the outside diameter of your copper tube.
Technical Specifications
| Material | Brass CW617N - 4MS |
| Colour | Gold-coloured brass |
| Nominal pressure | PN 16 bar |
| Thread standard | ISO 228-1 - BSPP Gas (parallel thread) |
| Sealing | Guaranteed flat gasket sealing (thickness from 1 mm) |
| Gasket seats | Between the flare of the tube and the seat of the male fitting |
| Shape | Hexagonal |
| Type | Female (tapped) — for flared copper tube |
| Connection | Flare on copper tube |
| Compatibility | Copper tube (outside diameter according to reference) |
| Compatible fluids | Drinking water, glycol water, compatible fluids |
| Temperature | Depending on the type of sealing chosen |
| Application | Drinking water supply, general plumbing, HVAC |
Operating Conditions and Installation
- Operating pressure: PN 16 bar
- Temperature: Depending on the type of sealing chosen
- Fluids: Drinking water, glycol water, compatible fluids
- Installation: Apply moderate tightening torque and choose suitable materials (risk of galvanic corrosion). Wrench flats sized to fit standard spanners.
Certifications and Compliance
- Drinking water: Compliant with the French decree of 25 June 2020 on metallic materials and products intended for installations in contact with water for human consumption.
- 4MS: Compliant with 4MS requirements — Harmonisation of European certification rules for materials and products in contact with drinking water.
Applications and Installation Tips
Uses
- Copper tube connection: joining a copper tube to a threaded fitting with a flare
- Domestic plumbing: connecting hot and cold water systems
- Industrial plumbing: PN 16 bar compliant installations
Installation tips
- Slide the nut onto the copper tube before making the flare
- Check the compatibility between the nut thread and the outside diameter of the copper tube
- Tighten with an open-end spanner or an adjustable spanner — do not use slip-joint pliers, to avoid marking the part
- Apply a moderate tightening torque — overtightening can deform the flare
Technical Drawing
Dimensions (mm)
All dimensions are given in millimetres (mm) unless otherwise stated.
| G | G (mm) | OD | L |
|---|---|---|---|
| 3/8" | 12x17 | 8.2 | 9.5 |
| 3/8" | 12x17 | 10.2 | 9.5 |
| 3/8" | 12x17 | 12.2 | 9.5 |
| 1/2" | 15x21 | 10.2 | 11 |
| 1/2" | 15x21 | 12.2 | 11 |
| 1/2" | 15x21 | 14.2 | 11 |
| 1/2" | 15x21 | 16.2 | 11 |
| 3/4" | 20x27 | 12.2 | 12 |
| 3/4" | 20x27 | 14.2 | 12 |
| 3/4" | 20x27 | 16.2 | 12 |
| 3/4" | 20x27 | 18.2 | 12 |
| 3/4" | 20x27 | 20.3 | 12 |
| 1" | 26x34 | 20.3 | 14 |
| 1" | 26x34 | 22.3 | 14 |
| 1"1/4 | 33x42 | 26 | 17 |
| 1"1/4 | 33x42 | 32 | 17 |
Available Size Combinations
This flare nut is available in the following thread / tube diameter combinations.
| Thread | Tube diameter |
|---|---|
| 3/8'' | Ø8.2 |
| 3/8'' | Ø10.2 |
| 3/8'' | Ø12.2 |
| 1/2'' | Ø10.2 |
| 1/2'' | Ø12.2 |
| 1/2'' | Ø14.2 |
| 1/2'' | Ø16.2 |
| 3/4'' | Ø12.2 |
| 3/4'' | Ø14.2 |
| 3/4'' | Ø16.2 |
| 3/4'' | Ø18.2 |
| 3/4'' | Ø20.2 |
| 1'' | Ø20.3 |
| 1'' | Ø22.3 |
| 1''1/4 | Ø32 |
The appearance of the part may vary depending on the batch in stock (see photos). Contact us for confirmation.
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