Large capacity oil sump with two oversized drain holes adaptable to circulating oil systems, cast in oil return slots to keep lubricants in, oil-equalization passage allowing pillow block to be drained completely from either side, offset dowels with matched numbers on cape and base to simplify correct assembly, cast-in dimples to locate drill holes for lube fittings, vents, sensors and mounting modifications, housing base threaded to accept grade 5 cap bolts for added strength and pry slots between the cap and base to allow easy separation. Utilizes E design spherical roller bearing insert for higher load carrying capacity. USAF and USDAF match industry standard SAF and SDAF mounting dimensions. Dodge Pillow Block Housing, Type USAF, Series: 518, 4-Bolt Base Mount, 4 in Base to Bore Centerline, 13.63 in Overall Length, 6.16 in Overall Width, 7-3/4 in Overall Height, Compatible Bore Diameter: 3-3/16 in, Compatible Bearing Type: 22200K Series Adapter Mounted Bearing, 10-1/4 to 11-3/4 in Bolt Center-to-Center Length, 3.88 in Base Width, Cast Iron Cast-in dimples locate drill holes for lube fittings, vents, sensors and mounting modificationsHousing base is threaded to accept four Grade 5 cap bolts for added strengthStandard housings have two oversized drains adaptable to circulating oil systemsPry slots allow easy separation of the pillow blockOne end closed