New in the tube carried as spares, 7/16" thread, 5/16" ball with oil hole thru the center. Adjuster is made from heat treated H-13 tool steel that has been triple tempered and salt bath nitrided for a smooth yet very durable finish. The threads are rolled and the ball has a shape design that is compatible with a pushrod cup depth that exceeds its own radius. Eight rocker arm adjusters are in the tube ready for some 10,000 rpm abuse.
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.