How to Read Bolt Markings: Identify Fastener Grade & Stre... 完全ガイド
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How to Read Bolt Markings: Identify Fastener Grade & Stre... 完全ガイド

2026-06-02· ~6 min read

How to Read Bolt Markings: Identify Fastener Grade。How to Read Bolt Markings: Identify Fastener Gradeの完全ガイド - 仕様、用途、アフリカ市場向けB2B輸出のサプライヤー選定。

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Why Bolt Markings Matter

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Metric Bolt Grade Markings

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GradeTensile StrengthProof StressYield StrengthCommon Applications
4.8400 N/mm²320 N/mm²320 N/mm²General applications, non-critical
8.8800 N/mm²640 N/mm²640 N/mm²Construction, machinery
10.91000 N/mm²900 N/mm²940 N/mm²Heavy machinery, vehicles
12.91200 N/mm²1080 N/mm²1152 N/mm²Precision machinery, critical applications

How to Read Bolt Markings

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Stainless Steel Bolt Markings

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Marking Recognition in African Projects

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よくある質問

See frequently asked questions below.

What are Technical Guide and how are they used?

Technical Guide are essential components in construction and manufacturing. Proper selection depends on load requirements, environmental conditions, and material compatibility.

How do I choose the right fastener for my project?

Consider the material being fastened, load requirements, environmental exposure, and applicable standards. Consult with a professional if unsure about specifications.

What materials are available for these fasteners?

Common materials include carbon steel, stainless steel, alloy steel, and specialty alloys. Each offers different strength, corrosion resistance, and cost characteristics.

Do you offer custom manufacturing?

Yes, we offer custom fastener manufacturing to spec. Contact our sales team with your requirements for pricing and lead times.

Need fasteners for your project? Get a factory quote from TradeGo.

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