Universal Lyre screws in various thread counts with brass finish.  Size & brand is a guideline since some brands have had multiple sizes over the years.  Contact us if you would like to check your model's fit. 
King Cleveland & Bach TR300H2 uses a 6-32, as well as newer Bach, Conn, & King horns.
Buescher uses a 6-36
Olds Ambassador, Getzen, Bundy, some Bach, & old old Holtons use 8-32
See my item ID# 275537173840 for more Yamaha choices.