Boss O-Ring Kit

Boss fittings are typically used in hydraulic applications, specifically for use in sealing straight thread tube fittings in a boss.  The AS 568 specification calls out specific sizes for these boss O-rings, and numbers them with 900 series numbers.  The RT/Dygert Boss O-ring kit features 212 O-rings in 20 popular AS568 900 series sizes.  This O-ring kit is manufactured out of solid grey plastic styrene, and features either a post or recess style O-ring retention.  Depending on the application, there are two different materials to choose from, either 90 durometer nitrile or fluorocarbon.