Heavy hex nut as per B18. 2.4.6M Grade A194 7M 1.M12-35 nos 2.M16-35 nos 3.M20-300 nos 4.M24-300 nos Heavy hex nut as per B18.2.2 ASTM A194 gr.7M 1.M12-50 nos. 2.M16-50 nos. 3.M20-300 nos. 4.M24-300 nos. Please quote for air freight to Chennai - India-CIF basis.