Image | Product + | Brand | Price | Availability | Qty |
M12x240 Cup Square Hex Coach Bolts Galvanised Bolt Only (Pack of 1)Product Code: M12-240CB-G | TIK Products |
£1.94 Ex VAT: £1.62 | 42 Packs In Stock | ||
M12x240 Cup Square Hex Coach Bolts Galvanised (Pack of 25)Product Code: FM12-240CB-G | Fixings Megastore |
£47.87 Ex VAT: £39.89 | Out Of Stock |
A carriage bolt, also known as coach bolt or as cup square hex bolts, has a domed 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.
Galvanised 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. Galvanise is a coating that (in contrast to iron oxide) does not trigger a breakdown of the substrates surface integrity as it is formed. The galvanise, if left intact, can act as a barrier to further oxidation, in a way similar to the protection afforded to aluminum and stainless steels by their oxide layers.
Fastener Specifications | |
Head Type | Cup Square Hex |
Bolt Diameter | 12mm |
Fixing Length | 240mm |
Thread Length | 100mm |
Thread Type | Metric |
Thread Pitch | 1.75mm |
Bolt Finish | Galvanised |
Material Grade | 4.6 Mild Steel |
Bolt Specification | DIN 603/1233 |