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.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.