Square O-Ring (ID:13 mm, CS:1.5 mm, OD:16 mm), 60PK The o ring is placed into a groove to secure them in place, and then compressed between two surfaces.
.1/4"-20 x 3-1/2" Silicon Bronze Coarse Thread Carriage Bolts 2PK The square section grips into the part being fixed (typically wood), preventing the bolt from turning when the nut is tightened.
.1/4"-20 x 3-1/2" Silicon Bronze Coarse Thread Carriage Bolts 2PK The square section grips into the part being fixed (typically wood), preventing the bolt from turning when the nut is tightened.