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Material B7

There are several grades of bolts but the three common grades for sae are 2, 5 and 8. the common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9. each grade has a specific bolt strength. no matter the system used to grade the bolts, the …

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Sae threaded rods do not require permanent grade markings on the ends of the rods like many astm specifications do. common finishes include plain black, zinc plated, and hot-dip galvanized for grades 2 and 5. grade 8 is typically provided plain finish only due to the potential risk of hydrogen embrittlement when plated or galvanized.

Astm a194 grade 2h heavy hex nut is made under the specification for carbon steel, alloy steel and stainless steel nuts for high pressure and high temperature services. there are different classes to these nuts such as 2, 2h, 2hm and so on. the different classes have different heat treatment properties and therefore varying mechanical properties.

Our corporation primarily engaged and export Material B7. we depend on sturdy technical force and continually create sophisticated technologies to meet the demand of Material B7 clients. We are sincerely welcome good friends from numerous circles at dwelling and abroad come to cooperate!


Material B7 exporter from China, we're one of the most skilled supplier from USA with ISO9001 Certification. Also the items happen to be certified by mutiple safety certification.We will provide our Material B7 priducts in top-quality and most favourable value.

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