This fuel ratio adjustment screw, for a variety of Keihin carburetor,
CBR22 CB400VTEC WH100T like.
If the size is fit, that you could use instead.
I marked the exact size in the picture, be sure to compare the size, then consider buying. To avoid unusable.
This product is a set of two screws sold two screws $ 6. Buy two or more sets, there is a 10% discount.
The following pictures are taken in kind, the pictures have marked exact size, contrast: