Check the listing for details. Adapter Kit for John Deere 4640 & 4240 Gen 4 AMS GPS Display Screen Monitor [C2]. Condition: New. Listed at 33.99 USD. Adapter Kit for the John Deere 4640 & 4240 Universal Gen 4 Display. This bracket converts the 4 bolt pattern to the John Deere 2 bolt pattern found on corner post brackets. The adapter is designed to clear the fins on the back of the John Deere 4640 monitor. It has maximum flexibility with up to 6 different mounting positions when used with the Quick Change Bracket. Made of 11-Gauge Steel and powder coated, the kit comes with 4 mounting bolts and 2 nuts for the Quick Change Bracket allen/hex screws.NOTE: This Adapter Kit can be used on BOTH the display and vehicle side of any setup allowing the Quick Change Bracket to work with any screen that has the VESA 75 X 75 bolt pattern. Some of the Ag Leader displays and Trimble displays use the VESA 75 X 75 bolt pattern. Check out my other listings for the Quick Change Bracket.