Parker 61VL-4 Compression Tube Nut Brass 1/4 in Od

Product Description

The PARKER 61VL-4 is a brass compression tube nut designed for use in hydraulic and pneumatic fluid line assemblies. It provides a secure, leak-resistant mechanical connection at the compression fitting interface, holding the sleeve and tube in position against the fitting body. Constructed from brass, this nut suits applications requiring moderate corrosion resistance and reliable sealing performance. It carries an NPTF thread standard with a straight thread size of 1/2-24 and accepts a 1/4-inch outside diameter tube. Operating temperature range spans -30 degrees F to 135 degrees C, making it suitable for a wide range of industrial and trade service environments.

This compression tube nut is used in fluid conveyance systems where compression-style fittings are specified. Typical applications include hydraulic lines, instrumentation tubing, and pneumatic plumbing in commercial and industrial settings. It is commonly installed by plumbers, pipefitters, and HVAC or refrigeration technicians working on copper or compatible metal tubing assemblies. The nut meets ISO 6149 and SAE J1926 standards, making it appropriate for systems built to those specifications.

Key Features

• Brass construction for moderate corrosion resistance in fluid line service
• Compression end connection for tool-assisted, leak-resistant tube joints
• NPTF thread standard with 1/2-24 straight thread size
• Accepts 1/4-inch outside diameter tubing
• Rated for service from -30 degrees F to 135 degrees C
• Compliant with ISO 6149 and SAE J1926 standards

Compatibility

Designed for use with Parker compression fitting assemblies requiring a 1/4-inch OD tube nut with a 1/2-24 NPTF straight thread, conforming to ISO 6149 and SAE J1926 standards.

Installation Notes

Installation is typically performed by a licensed plumber, pipefitter, or qualified HVAC technician. Depressurize and drain the line fully before disassembling any fitting. Use appropriate tube-cutting and deburring tools to prepare the tube end before seating the nut and sleeve. Do not overtighten the compression nut; follow the fitting manufacturer's recommended turns-past-finger-tight procedure to avoid deforming the sleeve or tube.