Screw In Billet Adapter for 2.5" Monza Gas Cap for 1996 & later Harley Davidson Thread Size_8MM and 1971 1991 FX foot pegs and 1971 1991 FX foot pegs Size 10 BHC 800 8 x 1 2 10 BHC 802 8 x 3 4 10 BHC 879 8 x 1 10 BHC 803 10 x 1 2 10 BHC 804 10 x 3 4 10 BHC 805 10 x 1 10 BHC 808 1 4 x 1 2 10 BHC 809 1 4 x 3 4 10 BHC 810 1 4 x 1 10 BHC 812 5 16 x 1 2 10 BHC 813 5 16 x 3 4 10 BHC 814 5 16 x 1 10 BHC 815 5 16 x 1 1 4 10 BHC 816 5 16 x 1 1 2 10 BHC 817 5 16 x 1 3 4 10 BHC 819 3 8 x 3 4 10 BHC 820 3 8 x 1 10 BHC 821 3 8 x 1 1 4 10 BHC 822 3 8 x 1 1 2 10 BHC 823 3 8 x 1 3 4 10 BHC 824 3 8 x 2 10 BHC 875 3 8 x 2 1 4 10 BHC 876 3 8 x 2 1 2 10 BHC 878 3 8 x 3 Street Cup 5" Monza Flip Up Gas Cap (not included)