KS B 0551-2015 Mechnical properties of fasteners — Part 7: Torsional test and minimum fracture torques for bolts and screws with nominal diameters 1 mm to 10 mm
2015KS B 0551-2015 Mechnical properties of fasteners — Part 7: Torsional test and minimum fracture torques for bolts and screws with nominal diameters 1 mm to 10 mm
1996KS B 0551-1996 Mechanical properties of fasteners Part 7 : Torsional test and minimum fracture torques for bolts and screws with nominal diameters 1 mm to 10 mm