nut for gear coupling reamer bolt for gear coupling NSS-242 NSS-224. NUS 125 KSS-190 75MM Key 20MM wide X 6MM Depth NSS190 CBS6 KSS-190 45 MM Key 14MM wide X 3.5MM Depth KSS-315 112 MM Key 32MM wide X 7MM Depth KSS-315 110 MM Key 28MM wide X 10MM Depth NSS-190 75MM Key 20MM wide X 6MM Depth NSS-190 45 MM Key 14MM wide X 3.5MM Depth NSS-315 112 MM Key 32MM wide X 7MM Depth NSS-315 110 MM Key 28MM wide X 10MM Depth IUS-A30