1 inch x 3/4 inch Black Iron Bushing

1 Inch x 3/4 Inch Black Iron Hex Bushing – Malleable Iron, NPT Threaded

The 1 inch x 3/4 inch black iron hex bushing is used to reduce the connection size between two female threaded fittings within gas, oil, or hydronic piping systems. Constructed from malleable iron and finished with a protective black coating, this fitting meets the requirements for threaded steel pipe applications in commercial and residential systems where corrosion resistance and high mechanical strength are critical.

Material and Design Specifications

• ✅ Material: Malleable Iron conforming to ASTM A197
• ✅ Finish: Black iron coating suitable for non-potable service (oil, gas, and steam)
• ✅ Connection Type: 1 inch male NPT x 3/4 inch female NPT
• ✅ Thread Standard: ASME B1.20.1 (taper pipe threads for general use)

Performance Attributes

• ✅ Pressure Rating: Up to 150 psi for steam and 300 psi for non-shock water, oil, and gas (WOG)
• ✅ Temperature Range: Suitable for service temperatures up to 350°F
• ✅ Thread Integrity: Machined to tight tolerances to reduce risk of thread galling and ensure leak resistance

Installation Recommendations

This black iron hex bushing should be installed using compatible pipe sealants or PTFE thread tape. Apply torque with a properly sized wrench to the hex flats—avoid over-tightening to prevent thread distortion or cracking. The fitting is not intended for use in potable water systems due to the nature of black iron coatings.

Common Applications

This fitting is widely used in natural gas distribution lines, hydronic heating systems, fire protection loops, and compressed air infrastructure. It is compatible with other malleable iron and steel threaded components within ANSI-rated systems.

Note on Code Compliance

All installations using black iron fittings must comply with applicable building, fire, and mechanical codes (e.g., NFPA 54, International Mechanical Code) governing the specific piping system. This fitting is not approved for direct contact with potable water under federal guidelines.