The Cup Square Bolt also known as a Carriage Bolt or Coach Bolt has a dome shaped head with a square section directly beneath the head and a normal round shank following.
The square portion of the shank stops the bolt rotating when the nut is tightened.
Used in security fixings as the domed head and nut prevents the bolt being unlocked from the insecure side.
Manufactured from mild steel and zinc coated for resistance to corrosion.
Please note: prices per pack, Supplied with nut.