Forgefix Carriage Bolts, Zp

- These Forgefix Carriage Bolts are Zinc Plated, and ideal for timber to timber joining. - They come complete with a hex nut and are fully threaded to 100mm. - Also known as 'Cup Square Hex Bolts', the square underneath the Cup stops rotation of the bolt when tightening. - Conform to DIN 603 and DIN 934 standards. - Available in a comprehensive range of sizes to suit most applications. - APPLICATIONUsed mainly for fastening timber to timber and is extensively used for timber joist construction in house building and numerous decking applications. - A Carriage Bolt, also known as a Coach Bolt or as a ‘Fully Threaded Cup Square Hex Bolt’, has a domed or countersunk head, and the shank 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. - A rib neck Carriage Bolt has several longitudinal ribs instead of the square section, to grip into a metal part being fixed. - Zinc coatings prevent oxidation of the protected metal to create a longer lasting finish. - It does this by forming a barrier and by acting as a sacrificial anode if this barrier is damaged. - Zinc oxide is a fine white dust that (in contrast to iron oxide) does not trigger a breakdown of the substrate’s surface integrity as it is formed. - The zinc oxide, if left intact, can act as a barrier to further oxidation, in a way similar to the protection afforded to aluminium and stainless steels by their oxide layers.. - UK size :M8 x 40, FR Size :M8 x 40, ES Size : M8 x 40 , DE Size: M8 x 40, IT size: M8 x 40, US & CA Size: M8 x 40 . - Code: UTTK13940