178-2991 MJ20x2.5 Self-Locking Hex Head Bolt
Cat® self-locking hex head bolt ensures secure fastening through a built-in locking feature, with no additional fasteners needed.
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Cat® self-locking hex head bolt ensures secure fastening through a built-in locking feature, with no additional fasteners needed.

Cat® hex head bolt for axle housing securely fastens the axle and maintains vehicle stability and internal alignment.


Cat® bucket linkage hex head bolt firmly joins elements for effective movement and operation.


Machine screws are available in a variety of head styles, drive types, sizes, and materials. Cat® fastener parts are designed for specific applications based on size, strength, clamp load and past performance, information other manufacturers do not have. They are carefully selected to last until machine rebuild or end of life. Non-Cat hardware and fasteners…








Cat® alternator hex head bolt securely holds the alternator in place, supporting the vehicle's power generation.

Cat® main frame hex head bolt provides structural integrity and secures the equipment's core frame.
