The LiftMaster 41D598-1 U Bracket for Square Rail is a genuine OEM replacement part from the Chamberlain Group designed for LiftMaster garage door openers that use a square rail assembly. This bracket connects the front end of the square rail to the header bracket mounted above the garage door, creating the secure pivot point needed for smooth, reliable travel of the opener. It’s an ideal replacement when the original bracket is bent, worn, or missing, restoring proper rail alignment and dependable operation.
This U bracket is intended for LiftMaster and compatible Chamberlain residential chain- or belt-drive models equipped with a square rail and is not intended for T-rail systems. Installation is straightforward and typically reuses the clevis pin and retaining hardware specified in your opener’s manual; always disconnect power, secure the door, and follow model-specific instructions to ensure correct orientation and safe operation. For best results, confirm your opener’s rail type and part number in the service manual or parts list to verify compatibility.