ALL BOLTS TO BE SUPPLIED TO BS 4190:2014 GRADE 8.8 C/W GRADE 8 NUT & 2 PAIRS OF SPNI NORDLOCK WASHERS. ALL BOLTS NUTS AND WASHERS TO BE HOT DIP SPUN GALV.TO BS EN ISO 10684:2004 Each item shall be marked with the material grade and manufacturer’s mark Special category bolting shall be traceable to a cast number on a 3.1 certificate. This will require traceability from item marking to the certificate.