Parker 61VL-3 Compression Tube Nut Brass Nptf 3/16 in

Product Description

The PARKER 61VL-3 is a brass compression tube nut designed to secure tubing connections in hydraulic and pneumatic fluid systems. It mates with compression-style fittings and provides a leak-resistant mechanical connection without the need for flaring the tube end. Manufactured from brass, this nut accepts tubing with a 3/16-inch outside diameter and uses a 7/16-24 straight thread. It meets ISO 6149 and SAE J1926 standards, making it suitable for applications where thread-form compliance is required. Plumbers, hydraulic system technicians, and fluid-systems mechanics are the primary installers of this component.

This compression tube nut is used in residential and light commercial fluid-handling systems, hydraulic lines, refrigeration tubing runs, and instrumentation plumbing where NPTF-compatible or straight-thread compression connections are specified. It is well suited to tight-space installations where tube flaring is impractical. The rated temperature range spans -30 degrees F to 135 degrees C, allowing use across a wide range of operating environments from cold ambient conditions to elevated-temperature process lines.

Key Features

• Brass construction resists corrosion in fluid-handling and refrigeration environments
• Accepts 3/16-inch outside diameter tubing for precise, secure compression connection
• 7/16-24 straight thread compatible with NPTF port standards
• Meets ISO 6149 and SAE J1926 standards for thread form and sealing performance
• Operating range of -30 degrees F minimum to 135 degrees C maximum
• Sold individually, allowing single-piece replacement or repair

Compatibility

Designed as an OEM-style replacement compression tube nut for fluid system assemblies requiring a 3/16-inch OD tube connection with a 7/16-24 straight thread meeting ISO 6149 and SAE J1926 specifications.

Installation Notes

Installation should be performed by a qualified hydraulic, plumbing, or refrigeration technician. De-pressurize and isolate the fluid line completely before removing or installing any compression fitting components. Hand-tighten the nut onto the fitting body before applying a wrench to avoid cross-threading the brass threads. Do not overtighten — brass fittings are susceptible to thread damage and ferrule deformation if excess torque is applied beyond snug-plus-standard-turn guidance from the fitting system manufacturer.