Technical supply conditions for threaded steel fasteners: Part 2 tolerances for fasteners - Bolts, screws, studs and nuts - Product grades a, b and c (Third Revision)
Technical supply conditions for threaded steel fasteners: Part 9 surface discontinuities section 1 bolts, screws and studs for general applications (Third Revision)
Industrial fasteners - Threaded steel fasteners - Technical supply conditions - Mechanical properties: Part 20 torsional - Test and mlnimum torques for bolts and screws with nominal diameters 1 mm to 10 mm