ball pins DIN 71803 form C with threaded pin DIN 71803 form C with threaded pin order example: ball pins DIN 71803 C 13 - M 8 • steel with a minimum tensile strength of Rm 600 N/mm²; ball hardened, degree of hardness at least 52 HRC or 550 HV 30, depth of hardening at least 1 mm (no full hardening permitted when d1 > 13 mm) • stainless steel 1.4305 • stainless steel 1.4571 surface • unplated • zinc plated optional features • ball pins without spanner flat; indication by A; e.g. A 16 - M 10 • ball pins with unhardened ball; indication by ball unhardened; e.g. C 13 - M 8 ball unhardened • ball pins with special length • ball pins acc. to drawing or at the choice of the manufacturer • further special options