Some Bogen / Manfrotto stands come with a 1/4" photo adapter. To convert this to the standard 5/8" thread used by mic clips and shockmounts, you'll need two adapters:
# 3111 | 1/4"W female > 3/8"W male
# 3366 | 3/8"W female > 5/8"-27 male
# MIBA | 3/8"W female > 5/8"-27 male (it seems this is the new model #)