The Cat 1123926 is a genuine Caterpillar hex flange bolt, engineered to provide maximum clamping force in various heavy-duty applications. This Grade 8 bolt features a 15.875 mm (0.625 inch) diameter and an 88.9 mm (3.5 inch) length, with UNC thread and a durable zinc yellow dichromate coating for corrosion resistance. Designed to work as a system with matching hardened washers and nuts, it ensures reliable attachment and secure mounting of components in Cat machinery, including a wide range of excavators, wheel loaders, and C4.4 engines.