Image | Product + | Brand | Price | Availability | Qty |
M10x30 Cup Square Hex Coach Bolts Zinc Plated (Pack of 100)Product Code: HX10-030CB-Z | HX Fixings |
£17.98 Ex VAT: £14.98 | 3 Days | ||
M10x30 Cup Square Hex Coach Bolts Zinc Plated (Pack of 100)Product Code: FM10-030CB-Z | Fixings Megastore |
£10.16 Ex VAT: £8.47 | 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.
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 substrates 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 aluminum and stainless steels by their oxide layers.
Fastener Specifications | |
Head Type | Cup Square Hex |
Bolt Diameter | 10mm |
Fixing Length | 30mm |
Thread Length | 30mm |
Thread Type | Metric |
Thread Pitch | 1.5mm |
Bolt Finish | Zinc Plated |
Material Grade | 4.6 Mild Steel |
Bolt Specification | DIN 603/1145 |