|Coating||Black, Electro Galvanized, Yellow, Hot dip Galvanized|
|Grade||SS 304, SS 316 & Grade 4.6|
|Standard||DIN in Metric and Imperial Size|
|Dia Range||M05 to M20 and ¼” to 3/4”|
It has a domed or countersunk head, and the shaft is topped by a short square section under the head. The square section grips into the part being fixed (typically wood), preventing the bolt from turning when the nut is tightened.