Stainless steel hexagon - head bolts, also known as stainless steel hexagon - head screws or simply stainless steel hex bolts. They are one of the most commonly used types of stainless - steel fasteners. The following is a detailed introduction:
- Material and Types: Usually made of stainless - steel wire, common materials include SUS201, SUS304, and SUS316. Among them, SUS304 is widely used, and SUS316 is often used for lathe parts with a higher price than SUS304. According to different materials, they can be divided into 201 stainless - steel hexagon - head bolts, 304 stainless - steel hexagon - head bolts, 316 stainless - steel hexagon - head bolts, etc.
- Structural Features: They have an external thread, which is mainly used to cooperate with a nut. Through this threaded connection, two parts can be combined into one. The head is hexagonal, which can be easily rotated by a hex wrench, facilitating the transfer of force to the bolt, ensuring that the bolt can be firmly fixed on the material.
- Common Standards: The commonly used standards include DIN933, DIN931, GB/T5783, GB/T5782, ISO4017, ISO4014, JISB1180, etc.
- Accuracy Grades: They are divided into three grades, A, B, and C. Grades A and B represent screw types with higher accuracy, which are required for products with high tolerance and quality requirements. Grade C is the common type, which is widely used due to its lower requirement for accuracy.
- Surface Treatment: Generally, there is no need for special treatment, as long as the bolt surface is kept dry.
- Application Scenarios: Due to their excellent corrosion - resistance and good appearance, they are suitable for occasions with high anti - corrosion requirements and high surface finish requirements, such as environmental protection equipment, medical equipment, communication equipment, power facilities, electronic products, food machinery, petrochemical industry, ship assembly, pump and valve pipelines, building curtain walls, outdoor occasions, etc.
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