Technical information:
Wheel bearing cone: M11x1
Wheel bearing cup Ø: 30.8 mm
Surface treatment: Zinc-plated
Number of ball rings: 2
For hub: Monark 90 mm
Monark 90, Full hub: M34U, M249, M249F, 309S, 339, 349, 449, 479, 579, 619, 629, 669, 679, 1202, 1211, 1212, 1221, 1222, 1231, 1232, 1241, 1242, 1251, 1261, 1282, 1291, 1292
MCB models sold as Monark: 901701, 901722
Mustang through 1964: 577, 578, 579, 596, 598, 599, 600, 603, 606, 609, 613, 616, 617, 618