This Power Steering Adapter Kit fits various power steering box applications with 9/16 - 18 and 5/8-18 ports. These adapters include crush washers and Teflon o-ring seals to seal the adapter to the box. A machined or spot-faced surface approximately .120" wide is required around the opening of the ports to ensure a positive seal, Crush washers and Teflon o-rings can be removed for applications where the ports contain inverted flare cones. Made in USA.