CATERPILLAR-CYLINDER-HEAD-SCREW

199-2175 is a cylinder head screw for Caterpillar engines — a smaller-diameter fastener than the main head bolts, typically securing an ancillary bracket or cover at the head rather than clamping the head to the block itself. It's easy to lump this in mentally with the main head bolts during a job, but it usually carries a different torque spec entirely, so worth checking Caterpillar's service literature for this specific fastener rather than assuming it matches the main bolts. Orange.net.za ships fast, South Africa-wide.