• Model NO.：304
• Application：Machinery, Chemical Industry, Environmental, Building
• Finish：Hot Galvanizing
• Transport Package：Wooden Boxes
• Specification：GB. 8
• Trademark：CZIT
• Origin：China
• HS Code：7318151090
• Production Capacity：50000

The performance grades of bolts for steel structure connection are divided into more than 10 grades, such as 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, and 12.9. The bolts of grade 8.8 and above are made of low-carbon alloy steel or medium-carbon steel. After heat treatment (quenching and tempering), they are generally called high-strength bolts, and the rest are generally called ordinary bolts. The bolt performance grade label consists of two numbers, which respectively indicate the nominal tensile strength value and the yield ratio of the bolt material.

wire → mould → heading machine → thread rolling machine → testing equipment

We also offer:

1. FORM E/CERTIFICATE OF ORIGIN
2. NACE MATERIAL
3.3PE COATING
4. DATA SHEET, DRAWING
5. T/T, L/C PAYMENT
6. TRADE ASSURANCE ORDER

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