Choosing the right bolt grade is one of the most important decisions in a steel structure. The grade sets the tensile strength, the clamping force and the cost, so matching it to the load case protects both the joint and the budget.
Both finishes protect steel from corrosion, but they behave very differently in service. This comparison covers coating thickness, thread fit, service life and where each one belongs.
Stainless fasteners are chosen for corrosion resistance rather than strength. Understanding the grades and the risk of galling keeps a stainless assembly working as intended.
From plain steel through to specialist coatings, the surface treatment decides how a fastener performs in service and how long it lasts. Here is what each option is for.
