ASTM A194 Gr 7 and A194 Gr 4 Heavy Hex Nuts difference

ASTM A194 Gr 7 vs A194 Gr 4 Heavy Hex Nuts Both ASTM A194 Grade 7 and Grade 4 Hex nuts are used assembled with ASTM A320 L7 or ASTM A193 B16 stud bolts. But in [...]