Eaton FF91494-4S Pipe Seal Nut 1/4 in Fnpt

Product Description

The EATON FF91494-4S is a steel pipe seal nut designed for use in industrial and mechanical piping systems where a secure, leak-resistant threaded closure is required. This fitting features a 1/4 inch female NPT (FNPT) connection and is used to cap or seal a threaded port without compromising system integrity. At 0.01 pounds, the component is lightweight and compact. It is typically installed by licensed plumbers, pipefitters, or HVAC technicians working on fluid or gas distribution systems that require port sealing at 1/4 inch NPT fittings.

This seal nut is suited for residential and light commercial plumbing, HVAC, and industrial fluid system applications where an FNPT threaded port needs to be sealed off. It is commonly used to close unused ports on manifolds, valves, and similar components. The FNPT connection type provides a standard tapered thread engagement, making it compatible with common 1/4 inch NPT threaded ports found across a wide range of piping assemblies.

Key Features

• 1/4 inch female NPT (FNPT) thread for standard tapered thread engagement
• Steel construction for durability in industrial and mechanical piping environments
• Compact, lightweight design at 0.01 pounds
• Seals unused or open threaded ports to prevent leaks and contamination
• Sold individually per package with a minimum order quantity of 4 units

Compatibility

Designed as an OEM-style replacement or supplemental fitting for systems with standard 1/4 inch female NPT threaded ports in industrial, HVAC, and plumbing piping applications.

Installation Notes

Installation should be performed by a qualified plumber, pipefitter, or HVAC technician. Depressurize and isolate the piping system before installing or removing any threaded fittings. Apply an appropriate thread sealant or PTFE tape to the threads per the system manufacturer's recommendations and applicable plumbing codes. Do not overtighten, as this may damage the threads or the mating port.