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DIN 933 A2-70 Hexagonal Bolt - China Suppliers & Factory for Grade 4.8, 8.8, 10.9, 12.9 Options
Product Introduction
introduction
The general thread diameter specification of DIN 933 bolts is M3-M64, and the common carbon steel performance grades are mainly 8.8 and 10.9. When d ≤ 39mm, stainless steel is usually A2-50/A2-70/A4-70/A4-80, which can refer to ISO 3506-1 or DIN 267-11.
The bolts of this standard are generally in metric (coarse thread) and fine thread, measured in millimeters (mm). The tolerance for DIN 933 coarse thread is 6g. Common coatings on the market include black coating, electroplating (blue white zinc, yellow colored zinc), and non electrolytic zinc powder coating (GEO). The tolerance fit before coating is mainly 6g/6H, and the tolerance band fit after galvanizing can be changed to 6h/6G. However, due to the influence of surface coating thickness after coating, when testing threads with corresponding tolerance gauges, there may be situations where they cannot fit. At this time, nut installation testing with matching specifications can be carried out.
DIN 933 bolt is a fully threaded hexagonal head bolt with a wide range of applications, commonly found in the following fields:
Mechanical manufacturing: used for the assembly and fixation of mechanical equipment, connecting various mechanical components.
Construction engineering: such as fixing steel structures, installing brackets, connectors, etc.
Automotive industry: can be used for fastening parts such as the engine, chassis, and body of automobiles.
Electronic devices: They play a role in connecting and fixing in the assembly of some electronic devices.
Petrochemical industry: suitable for the connection of chemical equipment, pipelines, etc. Some DIN 933 bolts can meet the anti-corrosion requirements of the chemical environment.
Shipbuilding industry: used for ship construction and equipment installation.
Aerospace: Used in areas with high requirements for strength and reliability.
Energy field: including the installation and fixation of equipment such as wind power generation and solar energy.
Manufacturing of pumps and valves: as connectors for pump shafts and valve stems.
Industrial equipment: Assembly of various general industrial equipment.
Frequently Asked Questions
What is the thread diameter range for DIN 933 bolts?
The general thread diameter specification of DIN 933 bolts ranges from M3 to M64.
What are the common performance grades for DIN 933 carbon steel bolts?
The common carbon steel performance grades for DIN 933 bolts are mainly 8.8 and 10.9.
What stainless steel grades are available for DIN 933 bolts?
When the diameter (d) is less than or equal to 39mm, stainless steel grades A2-50, A2-70, A4-70, and A4-80 are usually used, referring to standards ISO 3506-1 or DIN 267-11.
What coatings can be applied to DIN 933 bolts?
Common coatings on the market include black coating, electroplating (blue white zinc, yellow colored zinc), and non-electrolytic zinc powder coating (GEO).
What should I do if the tolerance gauge does not fit after coating?
If the thread gauge does not fit due to the thickness of the coating, you can conduct a practical nut installation test using matching specifications to verify the fit.
What industries commonly use DIN 933 bolts?
DIN 933 bolts are widely used in mechanical manufacturing, construction engineering, automotive, electronic devices, petrochemical, shipbuilding, aerospace, energy, pump and valve manufacturing, and general industrial equipment assembly.