Merit Brass K419-32 Pipe Locknut 2 in 304 Ss Threaded

Product Description

The MERIT BRASS K419-32 is a 2-inch pipe locknut manufactured from 304 stainless steel and designed to secure fittings, bushings, and other threaded components in piping assemblies. It uses a female national pipe straight locknut (FNPSL) thread connection and carries a 150 psi pressure rating in compliance with ISO standards. At 3 inches in length and weighing 0.51 pounds, it is a solid, corrosion-resistant hardware component suited for use in plumbing, industrial piping, and fluid-handling systems. Licensed plumbers and pipefitters are the primary installers of this type of hardware.

This locknut is appropriate for residential and light commercial piping applications where a secure, leak-resistant threaded connection is required. The 304 stainless steel construction makes it well suited for environments exposed to moisture, mild chemicals, or corrosive conditions. It is commonly used to lock fittings in place through panel cutouts, bulkhead installations, and manifold assemblies where axial retention is needed. The FNPSL thread form maintains a straight thread engagement, relying on a mating sealant or gasket to achieve pressure-tight connections rather than a tapered thread seal.

Key Features

• 304 stainless steel construction for corrosion resistance in wet and mildly corrosive environments
• FNPSL (female national pipe straight locknut) thread connection for straight-thread engagement
• 150 psi pressure rating suitable for standard plumbing and fluid-handling service
• ISO-compliant threading for dimensional consistency
• 3-inch length provides adequate thread engagement for secure locknut retention
• Sold individually, no minimum order quantity beyond one unit

Compatibility

Designed as an OEM-style threaded locknut for use with 2-inch pipe fittings and components requiring FNPSL straight-thread retention in ISO-compliant piping systems.

Installation Notes

Installation is performed by a licensed plumber or pipefitter. Depressurize and drain the affected piping section completely before removing or installing any threaded components. Because the FNPSL thread form is a straight thread, a compatible gasket or thread sealant must be used at the mating face to achieve a pressure-tight connection. Verify that thread engagement is full and even before applying final torque, and confirm the system is within the rated 150 psi operating pressure before returning it to service.