Clutch Kit with Bearings - Sparex Part S.146921LUK Clutch Kit with Bearings S. 146921 This LUK Clutch Kit with Bearings is a high quality replacement for your Case IH International Harvester tractor. It features a 310mm single cover with a dual segment cushion and standard damper. The kit includes a thrust pad (434052610) and a cerametallic loose disc with a 28. 6mm spline OD and 10 splines. The loose disc is torsion sprung and the housing is made of pressed steel. This clutch kit is designed for