1 inch x 1/4 inch Black Iron Bushing

Black Iron Bushing – 1" x 1/4" NPT, Threaded Reducing Fitting

The 1" x 1/4" Black Iron Bushing is a threaded reducing fitting used to connect components of dissimilar pipe sizes in systems requiring mechanical strength and corrosion resistance. Designed for use in gas, oil, steam, and air applications, this fitting reduces a larger female-threaded opening to a smaller male-threaded outlet.

Manufactured from cast black malleable iron, this bushing conforms to ASTM A197 and is machined to ANSI/ASME B1.20.1 NPT thread specifications. It is suitable for installation in low- to medium-pressure systems where durability and dimensional consistency are critical for maintaining joint integrity.

Product Features

• ✅ Connection Type: 1" Male NPT x 1/4" Female NPT
• ✅ Material: Black Malleable Iron per ASTM A197
• ✅ Thread Standard: ANSI/ASME B1.20.1 National Pipe Tapered (NPT)
• ✅ Operating Range: Suitable for use in mechanical, fuel gas, and low-pressure steam systems
• ✅ Finish: Uncoated black surface for indoor or dry-system use

Installation Guidelines

Apply appropriate pipe thread sealant or PTFE tape to male threads prior to installation. Thread into the mating fitting using a wrench applied to the external hex body. Do not overtighten, as this may compromise thread integrity or the host fitting. Always follow local code requirements regarding threaded pipe joint construction.

Application Areas

This bushing is commonly installed in mechanical rooms, boiler piping, natural gas or LP lines, air compressor systems, and HVAC distribution networks. It is used to reduce fittings such as tees, elbows, or valves for system adaptations or transitions in line sizing.

Material Consideration

Black malleable iron provides strength and temperature resistance while remaining machinable and dimensionally stable. Its use is widespread in threaded steel piping systems where welding is not practical or allowed by code.

Technical Specifications

• Nominal Sizes: 1" x 1/4"
• Thread Type: NPT (Male x Female)
• Material: Cast Black Malleable Iron
• Standards: ASTM A197, ASME B16.3, ANSI B1.20.1

The 1" x 1/4" Black Iron Bushing is a durable, code-compliant solution for reducing connection points within threaded steel piping systems. Its rugged construction supports long-term performance in both residential and commercial mechanical applications.