NOS, never mounted, never used. 

Part # = 90231-028-000
Part Description = NUT, LOCKING (16MM) - (replaces 90231-200-000, 90231-030-000, 90231-023-000)
ATC110-A 1980 110 ATC110 ATV
ATC110-B 1981 110 ATC110 ATV
ATC110-C 1982 110 ATC110 ATV
ATC110-D 1983 110 ATC110 ATV
ATC110-E 1984 110 ATC110 ATV
ATC110-F 1985 110 ATC110 ATV
ATC110-Z 1979 110 ATC110 ATV
ATC125M-E 1984 125 ATC125M ATV
ATC125M-F 1985 125 ATC125M ATV
ATC90-K0 1971 90 ATC90 ATV
ATC90-K1 1973 90 ATC90 ATV
ATC90-K2 1974 90 ATC90 ATV
ATC90-K3 1975 90 ATC90 ATV
ATC90-K4 1976 90 ATC90 ATV
ATC90-K5 1977 90 ATC90 ATV
ATC90-K6 1978 90 ATC90 ATV
CA200 1964 90 Touring 90 Street
CB200 1974 200 CB200 Street
CB200T 1975 200 CB200T Street
CB200T-K0 1976 200 CB200T Street
CL200 1974 200 Scrambler 200 Dual Sport
CL90 1967 90 Scrambler 90 Dual Sport
CM91 1966 90 Honda 90 Street
CT110-A 1980 105 Trail 110 Dual Sport
CT110-B 1981 105 Trail 110 Dual Sport
CT110-C 1982 105 Trail 110 Dual Sport
CT110-D 1983 105 Trail 110 Dual Sport
CT110-E 1984 105 Trail 110 Dual Sport
CT110-G 1986 105 Trail 110 Dual Sport
CT200 1964 90 Trail 90 Dual Sport
CT90 1966 90 Trail 90 Dual Sport
CT90-K1 1969 90 Trail 90 Dual Sport
CT90-K2 1970 90 Trail 90 Dual Sport
CT90-K3 1971 90 Trail 90 Dual Sport
CT90-K4 1972 90 Trail 90 Dual Sport
CT90-K5 1974 90 Trail 90 Dual Sport
CT90-K6 1975 90 Trail 90 Dual Sport
CT90-K7 1976 90 Trail 90 Dual Sport
CT90-K8 1977 90 Trail 90 Dual Sport
CT90-K9 1978 90 Trail 90 Dual Sport
CT90-Z 1979 90 Trail 90 Dual Sport
S90 1965 90 Super 90 Street
SL90 1969 90 Motosport 90 Dual Sport
ST90 1973 90 ST90 Mini Bike
ST90-K1 1974 90 ST90 Mini Bike
ST90-K2 1975 90 ST90 Mini Bike
TRX125-F 1985 125 TRX125 ATV
TRX125-G 1986 125 TRX125 ATV
XL175-76 1976 175 XL175 Dual Sport
XL175-77 1977 175 XL175 Dual Sport
XL175-78 1978 175 XL175 Dual Sport