Product Description

The Mueller 521-801 is a malleable iron plug with a nominal size of one-quarter inch and a threaded black square head. This plug is designed for a pressure class of 150 pounds and can handle fluids in oil and gas applications, making it suitable for various plumbing and HVAC needs.

• Constructed from durable malleable iron
• Compatible with NPT connections
• Meets ANSI/ASME and ASTM standards

Product Highlights

This plug is built for reliability in high-pressure environments. Its design ensures optimal sealing for various applications.

Product Information

Standard Information

• Part Number: 521-801
• Brand: Mueller

Technical Specifications

• Pressure Rating: 300 psi
• Temperature Rating: -20 to 150 deg F
• Material: Malleable Iron
• Finish: Black Oxide
• Nominal Size: 1/4 inch
• Application: Oil and Gas Fluid Applications
• Fitting Type: Plug
• End Style: NPT
• Mfg Standards: ANSI/ASME B1.20.1, ASME B16.3/B16.14, ASTM A153