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 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.