With heavy duty 1/4-12 threads and hex shaped weld-in threaded bung, tightening of the included jam nuts is super easy and secure.
JKS Manufacturing Front Upper Adjustable Control Arms - JKS1615 Sold in pairs. The ends are also fully rebuildable and greaseable..07-18 Wrangler JK, 2 & 4 Door;Adjustable arm design utilizing a forged adjustable flex end and jam nut;Forged end is fully rebuildable and greaseable;1-14 threads provide ultimate strength and fine-tune adjustability;CNC formed for proper tire, frame and axle mount clearance;California Residents: WARNING CNC-bent from DOM tubing for proper tire, frame and axle mount clearance, J-Flex control arms feature forged flex ends that are adjustable.