LASCO 17-6783 1/4-Inch Female Flare by 1/4-Inch Male Pipe Thread Brass Adapter
This fitting could be used in a Spunding Valve Build. A Spunding Valve allows you to ferment under pressure, naturally and precisely carbonate in the keg, fix over-carbonated beers and more.
Update: Since this post was published the price, availability or promotion has changed. Check the product page for current description, price and availability. Also: Today’s Deals on Amazon
Free Homebrew Audio Books: Free 30 Day Trial of Audible + TWO FREE Titles – lots of homebrew & beer titles available
More: Recent Amazon Finds