... Neck Carriage BoltCarbon steel C1035 or C1045 ZP, YZP Grade A (ASTM A307) or Grade 1 (SAE J429) 1. Other Standard options:DIN603 ... , YZP, BZP, Nickle or Chrome 4. Mechanical features options:DIN603 grade 4.8, 8.8, 10.9, 12.9SAE/ASTM ... , 5, 8 Below Regular supply offers,DIN603 ZP/YZP standard grade 8.8Small box+Carton+Pallet packingFOB Ningbo, China Offers 6x30 ...