Brass forged nut for HVAC and refrigeration flare connections. 45° SAE flare, SAE J512/J513 compliant. Forged brass construction resists vibration and mechanical pullout. Sizes 1/4″ to 7/8″. Working pressure 700 psi. Lead-free options available.
Our Brass Forged Nut is a precision-machined flare nut designed to secure 45° SAE flare connections on copper tubing in air conditioning, refrigeration, and heat pump systems. Manufactured from forged brass (not cast or machined from rod), it offers superior mechanical strength, vibration resistance, and a pore-free structure that prevents refrigerant seepage.
The nut features a 45° SAE flare seat that clamps the flared tube end against the fitting body, creating a reliable metal-to-metal seal. It is compatible with copper, brass, aluminum, and welded steel tubing that can be flared. Forged construction makes it ideal for high-vibration environments such as compressor discharge and suction lines.
| Parameter | Details |
|---|---|
| Material | Forged Brass (Copper-Zinc Alloy) |
| Standard | SAE J512 / SAE J513 |
| Type | Flare Nut (Short / Long) |
| Connection | 45° SAE Flare |
| Size Range | 1/4″ – 7/8″ (6.35mm – 22.23mm) |
| Working Pressure | Up to 700 psi |
| Operating Temperature | -65°F to +250°F (-54°C to +121°C) |
| Thread Type | UNF (SAE) |
| Surface | Smooth, lead-free options available |
Forged Construction – Forged brass eliminates porosity and seepage risk found in cast nuts, ensuring a leak-proof seal under high pressure
Vibration Resistant – Forged structure withstands vibration in compressor lines better than machined or cast nuts, extending joint life in demanding HVAC environments
45° SAE Flare Seat – Precision-machined flare seat creates a reliable metal-to-metal seal that can be assembled and disassembled repeatedly without damage
Lead-Free Options – Available in lead-free brass for potable water and environmentally sensitive applications
Full Size Range – 1/4″ to 7/8″ to match common ACR copper tube sizes, with short and long nut options
SAE J512/J513 Compliant – Meets functional requirements for refrigeration fittings, with UL listing for flammable liquids
Securing flare connections on refrigerant lines in split AC and refrigeration systems
Compressor discharge and suction line connections where vibration resistance is critical
Propane, fuel, and natural gas lines (UL listed for flammable liquids)
Repair and maintenance of existing 45° flare joints in HVAC equipment
OEM assembly of air conditioners, heat pumps, and refrigeration units
Size – 1/4″ to 7/8″, custom sizes available
Type – Short nut or long nut for vibration applications
Material – Standard brass; lead-free brass on request
Surface – Natural, nickel-plated, or custom finish
OEM/ODM – Custom weight, dimensions, and thread specifications accepted per customer drawing
Packaging – Bulk carton, individual bag, or custom labeled packaging
Lead Time – 7–25 days for standard sizes
MOQ – Flexible, contact us for details
Samples – Available upon request
For technical datasheets, samples, or bulk pricing, contact us directly.
