Lawson-HIS Z0306M540025 Carriage Coach Bolt & Nut ZP M8 x 25mm (Box of 100)

Zinc Plated and ideal for timber to timber joining. 
Comes complete with a hex nut.
Also known as 'Cup Square Hex Bolts', the square underneath the Cup stops rotation of the bolt when tightening.
Conform to DIN 603 / 555 Gr 4.8 
Extensively used for timber joist construction in house building and numerous decking applications.