Parker 61VL-8 Compression Tube Nut Brass Nptf 13/16-18

Product Description

The PARKER 61VL-8 is a brass compression tube nut designed for use in hydraulic and fluid transfer lines where secure, vibration-resistant connections are required. Built to Parker's Vibra-Lok compression style, this nut maintains a reliable grip on tubing under dynamic load and vibration conditions. It meets ISO 6149 and SAE J1926 standards and uses a 13/16-18 straight thread NPTF connection. Weighing 0.06 pounds, it is a lightweight but durable component suited for demanding fluid system assemblies. Licensed plumbers, pipefitters, and hydraulic system technicians are the primary installers.

This compression tube nut is used in hydraulic, pneumatic, and fluid power systems where NPTF threaded fittings are specified. The Vibra-Lok compression style makes it well suited for mobile equipment, industrial machinery, and any installation subject to continuous vibration that could loosen standard compression fittings. It is sold individually and is appropriate for both new installations and maintenance replacement work across residential and commercial fluid system applications.

Key Features

• Vibra-Lok compression style resists loosening under vibration
• Brass construction provides corrosion resistance in fluid system environments
• NPTF thread standard with 13/16-18 straight thread size
• Meets ISO 6149 and SAE J1926 standards
• Operating range from -30 degrees F to 135 degrees C (275 degrees F)
• Lightweight at 0.06 pounds — minimal added mass in compact assemblies

Compatibility

Designed as an OEM-style compression tube nut for NPTF fluid system fittings meeting ISO 6149 and SAE J1926 specifications.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or qualified hydraulic technician familiar with compression fitting assemblies. Depressurize and isolate the fluid system completely before removing or installing any fittings. Use the appropriate open-end or flare-nut wrench to avoid deforming the nut body. Follow applicable industry standards and equipment manufacturer torque guidelines when making up compression connections.