RockJock Greaseable Bolt w/ Hardware 9/16in Thread X 4 1/2in Long

This 9/16 inch-18 thread by 4 1/2 inch long bolt from RockJock features a built-in zerk fitting, making it easy to lubricate the joint it passes through. It’s a well-built piece that includes everything you need to get it installed: the bolt itself, two flat washers, and a stover nut. While RockJock uses these specifically for greasing their Johnny Joint rod ends, they’re versatile enough for many other applications where a greaseable fastener is beneficial, like leaf spring or control arm setups.

The bolt is made from grade 8 material, which is a strong choice for fasteners that need to handle significant stress. The included stover nut is a type of lock nut, meaning it has a deformed section that helps prevent it from backing off due to vibration, which is crucial for safety and longevity in automotive applications. Having a greaseable bolt like this means you can regularly service the joint, pushing out old grease and contaminants and replacing it with fresh lubricant, which greatly extends the life of the joint.