3607030474 is a genuine Bosch clamping unit (specifically a 6mm nut and collet assembly) used to secure accessories like grinding bits or burrs into Bosch straight grinders, including :
Cordless Models: GGS 18 V-LI, GGS 18V-10 SLC, GGS 18V-23 LC, and GGS 18V-20.
Corded Models: GGS 28 C, GGS 28 CE, GGS 28 LC, GGS 28 LCE, and GGS 8 CE.
High-Speed Models: HGS 65/50.