3/4 inch x 3/8 inch Black Iron Bushing

3/4 Inch x 3/8 Inch Black Iron Bushing – Threaded Reducing Fitting

The 3/4 inch x 3/8 inch Black Iron Bushing is a reducing fitting designed for use in low- to medium-pressure threaded piping systems. It facilitates the transition between larger and smaller nominal pipe sizes while maintaining a secure and pressure-rated threaded connection. Commonly used in gas, steam, air, and hydronic applications, this bushing meets standard specifications for malleable iron fittings.

Product Features

• ✅ Malleable Iron Construction – Made from black-coated malleable iron for strength and durability in mechanical piping systems.
• ✅ Threaded NPT Ends – Features tapered National Pipe Thread (NPT) threads for compatibility with ANSI B1.20.1 fittings.
• ✅ Corrosion-Resistant Surface – Black finish provides limited corrosion protection in dry indoor environments.
• ✅ Reduced Outlet Design – Allows direct size reduction without requiring multiple fittings or adapters.

Technical Specifications

• Material: Malleable black iron (ASTM A197)
• Size: 3/4 inch (female) x 3/8 inch (male)
• Thread Type: NPT per ANSI B1.20.1
• Rating: Class 150 for non-shock pressures up to 300 PSI (liquids) and 150 PSI (steam)
• Standard Compliance: ASME B16.3 and B16.14

Typical Applications

This reducing bushing is used to connect a smaller male-threaded pipe into a larger female-threaded fitting in applications such as:

• Natural gas and propane distribution systems
• Low-pressure steam and hydronic heating loops
• Compressed air supply systems
• Non-potable water and industrial piping networks

Installation Guidelines

Apply approved thread sealant (PTFE tape or pipe dope) to male threads prior to assembly. Avoid over-tightening, as this may damage the threads or fitting. Not suitable for potable water systems or highly corrosive environments unless specified by system design.

The 3/4 inch x 3/8 inch Black Iron Bushing provides a compact and reliable solution for pipe size transitions in threaded system layouts. Its compatibility with standard fittings and adherence to ANSI/ASME standards makes it a consistent choice for mechanical and piping professionals.