FSO OSHA cover kits are designed for shaft end mounted FSO or HPI clutches and are available from Formsprag® in size 400 through 1027. These cover kits provide not only the stationary cover enclosure required by OSHA, but provide additional protection for the clutch from abrasive environments as well. Formsprag Clutch® Cover Kit, For Use With: FSO-500 Clutch, 4-Bolt, 0.34 in Hole Dia, 3.63 in Bolt Circle Dia, 4.13 in Dia x 1-1/2 in W