Bulkhead is -10 AN thread and give the racer a ninety degree advantage in tight areas. Racer will need to purchase a bulkhead nut to fasten bulkhead in a flat panel.
RBS had an engine builder customer retire and traded in a whole box of new unused parts giving the racer a chance a some great deals. Make sure these are correct for your application before purchasing. RBS has one in stock so get it while it lasts!!!!!!!!!!!!!!!!!!!!
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.