Do you need to replace your U-bolt on your rotator unit? DX Engineering replacement U-bolt kits are ready and rugged to keep your rotator unit fastened. Specifically designed for antenna usage, DX Engineering replacement U-bolt kits offer maximum surface contact to prevent slippage! Our bolts are constructed from durable stainless steel and we include replacement stainless steel washers and nuts to complete your install. Replace lost or damaged U-bolts with new ones from DX Engineering.