521‑202HN – 3/8″ Black Malleable Iron Coupling

Compact Coupling for Black Pipe Systems

The 521‑202HN is a strong, 3/8″ female-threaded coupling made from malleable black iron, designed for joining threaded steel pipes or nipples in gas, oil, air, and non-potable water systems. Built to ANSI/ASME standards, this coupling delivers durability and leak-free performance in residential, commercial, and industrial applications.

Key Features

Durable Malleable Iron Construction – Provides superior strength and resistance to mechanical stress.
Precision NPT Threads – 3/8″ female NPT threads ensure a secure, leak-proof fit with standard black steel pipe.
Corrosion-Resistant Black Finish – Protects against rust and maintains an industrial look.
High Pressure & Temperature Tolerance – Suitable for applications up to 300–500 psi and temperatures up to 350°F.

Specifications

Model: 521‑202HN
Size: 3/8″ female NPT × 3/8″ female NPT
Material: Malleable iron with black oxide coating
Length: ~1.5″
Weight: ~0.12 lb
Pressure Rating: Up to 300–500 psi
Temperature Rating: Up to 350°F

Applications

Gas & Fuel Lines – Ideal for natural gas, LP gas, and oil systems.
Air & Steam Systems – Handles compressed air and low-pressure steam.
Industrial & Residential Piping – Perfect for HVAC, plumbing (non-potable), and mechanical systems.
DIY & Decorative Projects – Great for industrial-style furniture and shelving.

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Brand B&K

Diameter 3/8 Inch

Inlet Connection FIP

Outlet Connection FIP

Warranty Code 1-year limited warranty

Product Type Couplings

Product Material Malleable Iron

Standards HHXX, FM1920

UPC Code 032888406889

Shelf Pack 10

Minimum Order Qty 1

521-202HN 3/8IN BLACK COUPLING

About this item

521‑202HN – 3/8″ Black Malleable Iron Coupling

Compact Coupling for Black Pipe Systems

Key Features

Specifications

Applications

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