Description:Weld On Boss is internally threaded and is welded onto a structure allowing components to be assembled in place.Cat® Fastener & Hardware parts are designed for specific applications based on size, strength, clamp load, and past performance. This is information other manufacturers do not have. They are selected to last until rebuild or the life of the machine. While it may seem as though non-Cat hardware and fasteners are suitable for your machine, no other company knows your equipment like we do.Attributes:• Material: Steel• Port Type: -6 STOR• Thread Size: 9/16-18• Outside Diameter: 31.75 mm (1.25 in)• Overall Length: 22.6 mm (0.89 in)Application:Bosses are used to mount and secure components on Cat heavy-duty equipment. Consult your owner's manual or contact your local Cat Dealer for more information.