This 1/4" MPT (Male Pipe Thread) plug is great to use on any brass or aluminum port to seal air flow. We use the 1/4" MPT plug on our regulators and air distributors. When using with aluminum we find you sometimes need Teflon tape and a pipe thread sealant like Rectorseal. When using with Brass Teflon tape works fine.
WARNING: This product can expose you to lead, which is known to the state of California to cause cancer, birth defects and other reproductive harm. For more information go to: www.P65Warnings.ca.gov.