Reversible lock nuts as per enclosed picture REVERSIBLE LOCK NUT M 8 ZINC PLATED CLASS 8- 10 000 PCS - PER EVERY 2 MONTH REVERSIBLE LOCK NUT M 10 ZINC PLATED CLASS 8- 4 000 PCS - PER EVERY 2 MONTH REVERSIBLE LOCK NUT M 12 ZINC PLATED CLASS 8 - 20 000 PCS - PER EVERY 2