Bolt, High strength bolts, Screw
Standard specifications for internal and external nuts: The standard is GBT-4232-1993ZGX, and nuts are nuts used to tighten bolts or screw components. According to different materials, all components that must be used in manufacturing machinery are divided into carbon steel, stainless steel, non-ferrous metals (such as copper), and other main types. If all fastening substrates are made of metal materials, m6:8n.mm-12n.mm; M8:18n. mm~22n. mm; 1/4:8n. mm~12n. mm; 5/16:18n. mm~22n. mm; For non-metallic parts (such as engineering plastics), the torque is slightly lower. Standard specifications for internal and external nuts: The standard is GBT-4232-1993ZGX, and nuts are nuts used to tighten bolts or screw components. According to different materials, all components that must be used in manufacturing machinery are divided into carbon steel, stainless steel, non-ferrous metals (such as copper), and other main types. If all fastening substrates are made of metal materials, m6:8n.mm-12n.mm; M8:18n. mm~22n. mm; 1/4:8n. mm~12n. mm; 5/16:18n. mm~22n. mm; For non-metallic parts (such as engineering plastics), the torque is slightly lower.
What does the specification of the nut for m3 * 6 mean? M3 indicates that the standard nut diameter is 3mm and the pitch is 0.5mm. 6. The length is 6 millimeters. Non standard nuts are not included in national standards; 'Non standard' refers to 'not producing according to standards'. For use with other products, general products (this is for ease of use and maintenance)
Standard specification grade of inner and outer nuts: 4.8-10.9, M12-M48. Hot dip galvanized coating thickness ≥ 54 μ m. Quality and standards: Produced according to the requirements of GB5780-2000 and GB41-2000, with mechanical properties complying with GB3980.1-2000 and GB3980.2-2000
Please refer to GB/T5267.1-2002 for the selection of electroplating layer thickness for fasteners. The thickness of the electroplating coating is mainly selected based on the basic deviation of thread accuracy
Surface treatment, generally according to customer requirements, the commonly used thickness of galvanizing is between 5-8um
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