Loc-Line 41755 1/4″ to 1/8″ Female Pipe Reducers – Pack of 20

About This Product

The Loc-Line 41755 1/4″ to 1/8″ Female Pipe Reducer Coupling is a durable, precision-designed fitting that provides a convenient way to connect different pipe-thread sizes in industrial coolant delivery, fluid distribution, and modular hose applications.

Manufactured by Lockwood Products, the makers of Loc-Line, these reducer couplings feature female National Pipe Taper (FNPT) connections that allow compatible male-threaded components of different sizes to be joined.

Each reducer provides a 1/4-inch female NPT connection on one end and a 1/8-inch female NPT connection on the other, allowing users to adapt between these two common industrial pipe-thread sizes.

The Loc-Line 41755 is particularly useful when configuring machine-tool coolant systems, adapting fluid supply connections, or assembling custom distribution equipment that requires a change in threaded fitting size.

Constructed from durable acetal copolymer, these fittings offer strength, dimensional stability, and resistance to many commonly used industrial lubricants and coolants.

Unlike snap-together Loc-Line modular hose segments, the 41755 uses threaded connections. It is designed to join compatible male pipe-thread fittings rather than attach directly to a Loc-Line hose ball or socket.

Each package includes 20 female pipe reducer couplings, providing an economical solution for machine shops, manufacturing facilities, maintenance departments, and other applications requiring multiple fittings.

Whether you’re upgrading an existing coolant system, building custom fluid distribution assemblies, or maintaining spare fittings, the Loc-Line 41755 offers a practical connection between 1/4-inch and 1/8-inch NPT components.

Features

• Genuine Loc-Line component manufactured for industrial fluid-handling applications.
• Manufacturer part number 41755 for accurate identification and reordering.
• Pack of 20 reducers provides a convenient bulk quantity.
• 1/4-inch female NPT connection accepts compatible 1/4-inch male NPT fittings.
• 1/8-inch female NPT connection accepts compatible 1/8-inch male NPT fittings.
• FNPT reducer coupling design joins components with different nominal pipe-thread sizes.
• Acetal copolymer construction provides strength and dimensional stability.
• Corrosion-resistant plastic material eliminates metallic rusting of the fitting body.
• Suitable for many machine-tool coolant applications when fluid compatibility is verified.
• Useful for custom fluid distribution systems requiring threaded adapters.
• Compact connection design helps minimize unnecessary space requirements.
• Compatible with appropriate Loc-Line NPT connectors when the thread sizes match.
• Convenient maintenance component for repair and reconfiguration.
• Bulk packaging makes it practical to outfit multiple machines or systems.
• No moving parts provides a simple threaded connection.
• Industrial-grade construction intended for appropriate fluid and air delivery environments.

Specifications

Specification	Details
Manufacturer	Loc-Line / Lockwood Products
Manufacturer Part Number	41755
Product Name	1/4″ to 1/8″ Female Pipe Reducer Coupling
Product Type	Threaded Pipe Reducer
Package Quantity	20 Pieces
Larger Connection	1/4″ FNPT
Smaller Connection	1/8″ FNPT
Thread Standard	NPT – National Pipe Taper
Connection Configuration	Female to Female
Material	Acetal Copolymer
Primary Application	Fluid and Coolant Connection Adapting
Compatible Connections	Appropriate Male NPT Fittings
Manufacturer System Association	Loc-Line Threaded Accessories
Overall Dimensions	Not Independently Confirmed
Individual Fitting Pressure Rating	Not Independently Confirmed
Individual Fitting Temperature Rating	Not Independently Confirmed
Package Contents	20 × Loc-Line 41755 Reducer Couplings
Aquarium Submersion Compatibility	Not Established

Key Benefits

Convenient 1/4″ to 1/8″ Thread Conversion

The Loc-Line 41755 provides a straightforward way to join compatible male NPT components with different nominal thread sizes.

Its 1/4-inch and 1/8-inch female connections are useful in equipment installations where a smaller threaded fitting must be connected to a larger supply component.

Durable Acetal Construction

Acetal copolymer provides good mechanical strength, dimensional stability, and resistance to many common industrial chemicals.

This makes the reducer suitable for various industrial coolant and fluid-routing projects, provided the specific liquid and operating conditions are compatible.

Compatible with Loc-Line Threaded Accessories

The reducer can be used with appropriately threaded Loc-Line NPT fittings and other compatible male NPT components.

It is especially useful for adapting threaded connections as part of modular machine-tool coolant assemblies.

Cost-Effective Bulk Packaging

With 20 reducers per package, the Loc-Line 41755 is a convenient choice for industrial maintenance, equipment upgrades, and custom fluid-system installations.

Versatile Industrial Applications

The fitting can be used in a variety of compatible systems requiring a female-to-female threaded reduction, including machine-tool coolant delivery, workshop fluid distribution, and custom industrial equipment.

Recommended Applications

CNC Machine Coolant Systems

Adapt suitable male-threaded coolant fittings when converting between 1/4-inch and 1/8-inch NPT connections.

Industrial Fluid Distribution

Connect compatible threaded components in custom liquid distribution and routing assemblies.

Loc-Line Coolant System Modifications

Use with properly sized Loc-Line NPT components when configuring machine-tool coolant systems.

Maintenance and Repair

Replace worn or damaged reducer fittings in compatible fluid-handling equipment.

Custom Equipment Assemblies

Useful for custom industrial projects requiring a compact female-to-female pipe-thread size transition.

Workshop Air and Coolant Connections

May be used in compatible low-pressure air or coolant systems when the pressure, temperature, material compatibility, and applicable safety requirements have been verified.

Installation and Usage Instructions

1. Verify thread sizes: Confirm that one connection requires 1/4-inch FNPT and the other requires 1/8-inch FNPT.
2. Confirm thread compatibility: Both mating components must use compatible male NPT threads.
3. Depressurize the system: Shut off fluid or air flow and relieve all pressure before installing fittings.
4. Inspect the connections: Check for damaged threads, contamination, and debris.
5. Prepare the threads: Follow the equipment manufacturer’s recommendations for a thread sealant compatible with acetal plastic and the fluid being handled.
6. Start both connections carefully: Engage the threads by hand to avoid cross-threading.
7. Tighten appropriately: Use suitable tools and avoid excessive torque, which can damage plastic threads.
8. Verify alignment: Ensure connected components are not placing unnecessary bending loads on the reducer.
9. Restore flow gradually: Reintroduce operating pressure cautiously.
10. Inspect for leakage: Check both threaded joints before returning the equipment to normal operation.

Important: NPT and BSPT threads are different standards. Do not assume these reducer couplings will seal properly with BSPT fittings.

Package Contents

• 20 × Loc-Line 41755 1/4″ to 1/8″ Female Pipe Reducer Couplings

Loc-Line hose segments, nozzles, threaded connectors, valves, and other accessories are sold separately unless otherwise specified.

Important Product Information

The Loc-Line 41755 is a female-to-female threaded reducer coupling, not a snap-together Loc-Line hose reducer.

This product is intended to join compatible 1/4-inch male NPT and 1/8-inch male NPT threaded components.

It should not be confused with the following Loc-Line products:

• Loc-Line 40655: 1/4″ to 1/8″ FNPT Reducer Coupling, Pack of 4.
• Loc-Line 41756: 1/8″ NPT Female Pipe Coupling, Pack of 20.
• Loc-Line 41757: 1/4″ NPT Female Pipe Coupling, Pack of 20.
• Loc-Line 41411: 1/4″ Loc-Line Socket to 1/8″ FNPT Adapter, Pack of 4.

These fittings serve different connection purposes and are not necessarily interchangeable.

The individual fitting’s maximum pressure and temperature ratings were not independently confirmed. Distributor-published Loc-Line system limits should not automatically be treated as the rating of this specific reducer.

Although Loc-Line fittings are sometimes used in custom aquarium projects, the manufacturer identifies this reducer primarily as an industrial fluid-handling accessory.

Suitability for continuous freshwater or saltwater exposure, aquarium submersion, potable water applications, or direct contact with aquatic livestock should be verified before use.

Always confirm chemical compatibility and observe the verified operating limits of the complete assembly.

Availability and Pricing

We ship daily, contact us for availability and price.

Recommended Application

The Loc-Line 41755 1/4″ to 1/8″ Female Pipe Reducer Coupling, Pack of 20 is an excellent choice for industrial users who need a reliable threaded connection between compatible 1/4-inch and 1/8-inch male NPT fittings.

Its durable acetal construction, convenient female-to-female design, and economical 20-piece package make it useful for CNC coolant systems, fluid distribution equipment, maintenance operations, and custom industrial assemblies.