The S35C M7 * 45.5 Adj Nut 6X28 for Automotive / Motorcycle with MFZn2-K coating for corrosion resistance, features a main size of M7 *45.45 and is designed for precise compatibility with the K1AA model.
https://www.zjmgmm.com/product/hardware-motorcycle-parts/s35c-m7-45-5-adj-nut-6x28-for-automotive-motorcycle.html