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M6, M8 & M10 Zinc Cup Square Carriage Bolt Including Bright Zinc Full Hex Nut
Bright Zinc Cup Square Hexagon Bolts with Hex Nuts
Cup square carriage bolts meeting standard DIN 603 with hex nuts meeting standard DIN934 are mostly used in wood. The Cup Square Bolts also known as a coach bolt or carriage bolt have a domed top and a square under the head which pulls into the part being fixed, preventing the bolt from turning when the nut is tightened.
A carriage bolt is also commonly used in drilled concrete fences and gate posts to fasten wooden posts and panels
The majority of sizes fully threaded up to 150mm, any longer than this is typically part threaded for some more strength
NUTS ‘N’ BOLTS® Cup Square Carriage Bolts With Hex Nuts are CE APPROVED and meet DIN 603 Standards so quality is guaranteed
- M6 M8 M10 Diamaters (Other Sizes available on other listing)
- Lengths from 20mm up to 200mm+
- Bolts mostly used in wood
- Bright Zinc Plated (BZP) and passivated
- Bolts Conforms to DIN603 standard
- Metric coarse thread
- Standard 4.8 Grade
- Exceptional High Quality
- Sent via Royal Mail 48
Please select your required size and quantity from the drop down menu at the top of the page.
Domed top and a square under the head. The square section grips into the part being fixed; preventing the bolt from turning when the nut is tightened.
Cup square bolts are also commonly referred to as carriage bolts or coach bolts due to their original usage in the manufacture of rolling stock. Cup square bolts consist of a domed circular head with a square neck portion and then a round shank.
The shank consists of both a plain load bearing portion as well as a threaded portion. Cup Square bolts are usually used in conjunction with a hexagon threaded nut (cup square hex) which fastens onto the thread of the Cup square bolt.
The bolt is locked into placed by the square neck as the nut is fastened onto the stationary bolt. Cup square bolts are widely used in construction, engineering, fencing and woodworking environments.
As with hexagon headed bolts, when measuring the length of a Cup square bolt it is important to measure from the underside of the head and not to include the bolt head to the end of threaded portion.
The diameter of the cup square bolt is measured from the actual diameter of the threaded portion and not the square neck.
Typically the square under the head is the same as diameter for example on a M8 carriage bolt the square will be 8 x 8 mm
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