Imperial & Metric Hex Nuts Export: Standards Guide. Полное руководство по Imperial & Metric Hex Nuts Export: Standards Guide - спецификации, применение и выбор поставщиков для экспорта B2B на африканские рынки.
Imperial Standard Hex Nuts: UNC/UNF for Export
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DIN and GB Standard Nuts for International Export
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Hex Nut and Bolt Grade Matching Chart
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| Bolt Grade | Min Nut Grade | Nut Type | Material/Coating |
|---|---|---|---|
| 4.8 (Carbon Steel) | Grade 5 (A563) | Standard Hex | Zinc Plated |
| 8.8 (Carbon Steel) | Grade 8 (A563) | Heavy Hex | Zinc Plated or HDG |
| 10.9 (Carbon Steel) | Grade 10 (A563) | Heavy Hex | HDG (outdoor) |
| 12.9 (Alloy Steel) | Grade 12 (A563) | Heavy Hex | Zinc Plated or Black Oxide |
| A2-70 (304 SS) | A2-70 | Standard Hex | Passivated SS |
| A4-80 (316 SS) | A4-80 | Heavy Hex | Passivated SS |
| A325 Structural | A563 DH | Heavy Hex | HDG (same lot) |
| A490 Structural | A563 DH or A194 8 | Heavy Hex | HDG or Natural |
Frequently Asked Questions
See frequently asked questions below.
What nut grade matches an 8.8 bolt?
Grade 8 (proof load 890 MPa) is the minimum match for 8.8 bolts. Heavy hex Grade 8 is preferred for structural connections.
Can GB and DIN nuts be used interchangeably?
Yes, GB and DIN metric nuts are harmonized under the ISO agreement and are dimensionally interchangeable. ISO 4032 replaces both DIN 934 and GB/T 6170.
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