Mueller Plug Square Head 521-803HN - Black - 1/2 In.

The Mueller Black Plain Plug is a reliable choice for sealing gas, oil, and air lines in a variety of motor vehicles. Designed for universal vehicle fitment, this 1/2 in. plug is constructed from durable materials and features a plain black finish for a clean, professional look. Rated to withstand up to 300 PSI at 150°F and 150 PSI for steam applications, it meets Class 150 and ANSI standard B16.3 requirements, as well as ASTM A-197 specifications. This automotive specialty part type is ideal for both professional mechanics and DIY enthusiasts who need a dependable solution for automotive repairs or maintenance. The Mueller Black Plain Plug is easy to install and provides a secure seal, making it suitable for a wide range of automotive and industrial uses. Manufactured by Ace Trading - Fittings Bk, this plug is a trusted component for those seeking compatibility with products like the Southland 521 206hn. Choose the Mueller Black Plain Plug for your next project to ensure lasting performance and peace of mind.