This is an authorized part for these Yamaha Clarinets.

Yamaha Clarinet Key Hinge Rod Pivot Screws

For models:

ADCL-1
YCL-20
YCL-200AD
YCL-200AD(2)
YCL-200DR
YCL-200DT
YCL-250(#001001-)
YCL-250E
YCL-250SUK
YCL-255
YCL-255E
YCL-255S
YCL-26
YCL-26(2)
YCL-26(2)M
YCL-26(2)MSUK-T
YCL-350DX
YCL-355
YCL-C100
YCL-S1
Oboe
YOB-211
YOB-241
YOB-441A
YOB-441P