5/8" OD Brass Flared Nut

BrassCraft 41S-10 – 5/8" OD Brass Flare Nut for High-Integrity Tube Connections

The BrassCraft 41S-10 is a 5/8" OD brass flare nut designed for secure mechanical connections in flared tubing systems. Manufactured from solid brass, this fitting is engineered to resist corrosion, mechanical pullout, and vibration, making it suitable for use in gas, fuel, hydraulic, and refrigeration lines. The nut features a 7/8-14 straight thread and a hex size of 1 inch for standard wrench compatibility.

With a broad temperature range of -65°F to 250°F, the 41S-10 performs reliably across demanding industrial and commercial environments. It is compatible with copper, aluminum, brass, and welded steel tubing, provided wall thickness supports flaring without deformation.

Key Attributes

• ✔ Solid Brass Body – Machined for dimensional precision and long-term service life
• ✔ Vibration Resistance – Designed for systems subject to motion or mechanical stress
• ✔ High Temperature and Pressure Capability – Rated for use up to 250°F and 150 psi (depending on application)
• ✔ Thread Specification – 7/8-14 UNF for standard flare fitting assemblies
• ✔ Use Case – Ideal for HVAC, fuel line, and refrigeration installations

Technical Specifications

• Nominal Tube Size: 5/8 inch OD
• Thread Size: 7/8-14 (UNF)
• Hex Size: 1 inch
• Overall Length: 1.12 inches
• Material: Brass
• Temperature Range: -65°F to 250°F
• End Style: Flared

Installation Guidelines

Ensure tubing is properly cut and flared using appropriate tools before installing the nut. Always use torque values recommended by tubing material and size specifications. For critical systems, leak and pressure testing after installation is recommended. Use only with tubing that meets ASTM B280 or similar standards.

Professional Use Consideration

The BrassCraft 41S-10 flare nut is a job-site ready component suitable for commercial-grade installations requiring high mechanical strength and a leak-resistant seal. It is widely used in HVAC systems, gas appliance connections, and hydraulic applications.