Mushroom Head Threaded Boxed in 10 M20 x 75mm Coach screws are ideal for timber to timber joining. Comes complete with hexagon nut. Also known as cup square. The square underneath the cup stops rotation of the bolt when being tightened.

Mushroom Head Threaded Boxed in 10 M20 x 100mm Coach screws are ideal for timber to timber joining. Comes complete with hexagon nut. Also known as cup square. The square underneath the cup stops rotation of the bolt when being tightened.

Mushroom Head Threaded Boxed in 10 M20 x 180mm Coach screws are ideal for timber to timber joining. Comes complete with hexagon nut. Also known as cup square. The square underneath the cup stops rotation of the bolt when being tightened.

Mushroom Head Threaded Boxed in 10 M20 x 200mm Coach screws are ideal for timber to timber joining. Comes complete with hexagon nut. Also known as cup square. The square underneath the cup stops rotation of the bolt when being tightened.

Mushroom Head Threaded Boxed in 10 M20 x 400mm Coach screws are ideal for timber to timber joining. Comes complete with hexagon nut. Also known as cup square. The square underneath the cup stops rotation of the bolt when being tightened.