CAT 307, 312, 315, 320, 330, 336, 340, 345 screw CAT 307 screw (7X-2553) A screw used to mount the drive wheel in excavators of the well-known CAT brand. Fits models 307, 312, 315, 320, 330, 336, 340, 345, 350, 365, 390.
It appears in the catalog under the number: 7X-2553.
It is a screw with a hexagonal head and threads along its entire length. Its total length is 50 mm.
To fasten the screw you need a size 24 wrench.