Coach screw is also know as lag bolt. coach screw is commonly used for connecting between two heavy wooden materials or metal to wood. coach screw could be six sided hexagonal or square head but most commonly used is hexagonal six sided.
Galvanized (G.I) Coach Screw Available from 1/4" till 5/8"
Stainless Steel (S.S) Coach Screw Grade 304 Available from 6 mm till 12 mm