Parker 61C-5 Compression Tube Nut 5/16 Od Brass Sae J-512

Product Description

The PARKER 61C-5 is a brass compression tube nut designed to secure tubing connections in fluid and pneumatic lines. It threads onto mating compression fittings using a 1/2-24 inch thread and is sized for 5/16 inch outside diameter tubing. Machined from brass to SAE J-512 standards, this nut is rated for up to 300 psi working pressure and handles temperatures from -65 degrees F to 250 degrees F. It is a standard component used by HVAC technicians, plumbers, and refrigeration mechanics wherever reliable, leak-free compression connections are required.

This compression tube nut is suited for residential and light commercial applications involving copper or brass tubing. Common install scenarios include refrigerant line connections, fuel lines, and hydraulic or pneumatic systems where compression-style fittings are specified. Its brass construction resists corrosion in wet or humid environments, making it a practical choice for plumbing and HVAC service work. Sold individually; minimum order quantity is 5 pieces.

Key Features

• Brass construction meets SAE J-512 standards for compression fittings
• 1/2-24 inch thread size for secure mating with standard compression fitting bodies
• Fits 5/16 inch outside diameter tubing
• Rated to 300 psi maximum working pressure
• Wide service temperature range: -65 degrees F to 250 degrees F
• Corrosion-resistant brass material suited for wet and humid environments

Compatibility

Designed as an OEM-style replacement or service component for compression fitting assemblies requiring a 1/2-24 threaded nut for 5/16 inch OD tubing per SAE J-512.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or refrigeration mechanics. Shut off system pressure and depressurize the line before disassembling any compression fitting. Hand-tighten the nut onto the fitting body first, then snug with an appropriately sized open-end wrench — avoid over-tightening, which can deform the ferrule and cause leaks. Work must comply with applicable plumbing and mechanical codes such as the IPC or IFGC as required by jurisdiction.