TIMCO BZP Carriage Bolt with Hex Nut M12 x 240 Zinc Box of 10

ManoMano

General description A domed head bolt with a square anti-spin shoulder, primarily used for clamping timber or attaching ironmongery to timber. This product includes nuts and features visible markings on the domed head. Technical specifications Type: Carriage Bolts DIN603 Size: M12 x 240 Threading: Partially threaded Included: Hex Full Nuts DIN934

Amazon

A round head and a square neck that prevents the bolt from turning while the nut is tightened. Ideally suited for timber to timber joining Hex nut included Zinc plated to increase resistance to corrosion