RS Vintage Parts RSV-B00ZGDNK3U-00669 Black Steel Fuel Gas Tank Locking Cap Willys 46-64 CJ-2A CJ-3A CJ-3B Jeeps Brand new black painted fuel gas tank lockable filler cap with 2 keys The tank cap shown is suitable for use onwillys cj2a cj3a jeeps The outer dia of the cap is 68mm and will fit to tank with 45mm hole