Dodge Pillow Block Roller Bearing Unit, Unified SAF, 8-1/2 in Bore Dia, 1.188 in Bolt Center-to-Center Length, 28-3/4 in Overall Length, 16-5/8 in Overall Height, Four-Bolt Base Mount, Round Bore Type, Adapter Mounted Locking Device, Triple-Tect Seal, Non-Expansion Expansion Type, 260000 lb Dynamic, 950 rpm Maximum, Cast Iron Cast-in dimples locate drill holes for lube fittings, vents, sensors and mounting modificationsHousing base is threaded to accept four grade five cap bolts for added strength that match base bolts for one-wrench installationStandard housings have two oversized drains adaptable to circulating oil systemsPry slots allow easy separation of the pillow blockCap bolts match base bolts for one-wrench installationUSAF housings also match standard dimensions to assure interchangeability