Designation GOST, (USSR):- Designation DIN, ISO:20210K/C3 Features:Barrel roller bearing with  tapered bore and adapter sleeve and increased thermal clearance (C3)  

Features: Seat inner cages made under cone (K), taper 1:12 and increased thermal clearance (C3)  

Designation DIN, ISO: 20210K/C3 Features: Barrel roller bearing with  tapered bore and adapter sleeve and increased thermal clearance (C3)