What Does 8.8 Mean on a Bolt? Buyer’s Guide
When buyers see “8.8” on a bolt head, it is easy to think it is just a factory mark. It is not. For metric bolts,
XZ FASTENER
22 April, 2021
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Industrial Fastening Knowledge · Industry Trends · Technical Insights
When buyers see “8.8” on a bolt head, it is easy to think it is just a factory mark. It is not. For metric bolts,
Corrosion is rarely just a cosmetic problem. In industrial assemblies, rust can reduce thread engagement, weaken clamp load, make maintenance difficult, and create safety risks.
Coating selection is rarely just about rust. In real assemblies, the coating also affects friction, torque, thread fit, galling, and how well the joint holds
Cold heading is one of the main production methods for bolts, screws, rivets, pins, and many special fasteners. The process forms metal at room temperature
Replacing expensive fasteners with equivalent standards can reduce cost, shorten lead time, and simplify inventory. It can also create serious problems if the substitution is
For European steel construction projects, structural fasteners are not treated like ordinary hardware. If a bolt assembly is used in a regulated structural application, buyers
Fastener finish selection should not start with color or unit price. It should start with the expected service life. For industrial buyers, the real question
For fastener imports, EXW and FOB can look like two simple price terms. In practice, they create very different cost and responsibility structures. This matters
In fastener procurement, quantity and delivery details are often treated as simple administrative information. In practice, they are one of the most important factors affecting
Industrial Fastening Knowledge · Industry Trends · Technical Insights
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