Round Head Short Square Neck Bolts
1.Product: ASME B18.5.2.1M Metric Round Head Short Square Neck Bolts
2. Source bolt manufacturer, own factory: with price advantage, eliminating the price difference of middlemen.
3. Adopt the industry's top high-quality thickened steel, high stability and long-lasting durability.
4. Support customer customization.
5. Professional sales and after-sales service, welcome to inquire at any time.
6. Delivery on time.
ASME B18.5.2.1M standard of Round Head Short Square Neck Bolts developed by the American Society of Mechanical Engineers (ASME) that specifies detailed specifications and dimensions for round head square neck bolts. Round head carriage bolts have a round head and square neck, this design is often used in applications that require a specific head shape and neck configuration. The square neck allows the use of specific tools, such as a wrench or wrench chuck, to turn the bolt, especially when head space is limited or when increased torque transfer efficiency is required. Round head carriage bolts are commonly used in construction, mechanical engineering, automobiles and other fields that require high strength and reliable connections.
Pictures
Product drawing
Product Specification
Size | M6 | M8 | M10 | M12 | M14 | M16 | M20 | |
P | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | |
da min | 12.2 | 15.8 | 19.6 | 23.8 | 27.6 | 31.9 | 39.9 | |
dc max | 14.2 | 18.0 | 22.3 | 26.6 | 30.5 | 35.0 | 43.0 | |
ds | max | 6 | 8 | 10 | 12 | 14 | 16 | 20 |
min | 5.21 | 7.04 | 8.86 | 10.68 | 12.50 | 14.50 | 18.16 | |
e | max | 9.16 | 12.13 | 14.96 | 17.96 | 20.79 | 23.62 | 29.74 |
min | 7.64 | 10.2 | 12.8 | 15.37 | 17.97 | 20.57 | 25.73 | |
k | max | 3.6 | 4.8 | 5.8 | 6.8 | 7.9 | 8.9 | 10.9 |
min | 3 | 4 | 5 | 6 | 7 | 8 | 10 | |
k1 | max | 3 | 3 | 4 | 4 | 4 | 5 | 5 |
min | 2.4 | 2.4 | 3.2 | 3.2 | 3.2 | 4.2 | 4.2 | |
r | max | 0.5 | 0.8 | 0.8 | 0.8 | 1.2 | 1.2 | 1.6 |
min | 0.2 | 0.4 | 0.4 | 0.4 | 0.6 | 0.6 | 0.8 | |
s | max | 6.48 | 8.58 | 10.58 | 12.7 | 14.7 | 16.7 | 20.84 |
min | 5.88 | 7.85 | 9.85 | 11.82 | 13.82 | 15.82 | 19.79 | |
Some introduction about our company
Workshop
The workshop of Jinan Star Fastener Co., Ltd. is the core area of the company's production and manufacturing, with advanced production equipment. The reasonable layout of the workshop and the scientific production process ensure the efficient production and high-quality output of fastener products.
Testing Equipment
Jinan Star Fastener Company attaches great importance to product quality and is equipped with complete quality inspection equipment, such as tensile testing machines, torque testers,metallographic microscopes, optical projectors, salt spray test chambers, coating thickness gauges, etc., which are used to test the tensile strength and elongation of fastener products and evaluate the mechanical properties of products. These equipment ensure that every link from raw materials to finished products can be strictly controlled in quality.
Production equipment
In order to meet the needs of different customers, the company has introduced a series of advanced production equipment, such as multi-station cold heading machines, thread rolling equipment, heat treatment equipment, shot blasting machines, sand blasting machines, electroplating lines and other surface treatment equipment, and fully automatic packaging equipment. These equipment not only improve production efficiency, but also ensure the consistency and stability of product quality.
FAQ
About standards:
1. What dimensions and specifications are specified in the ASME B18.5.2.1M standard?
Answer: The standard specifies in detail the dimensions, tolerances, materials, surface treatment, marking and identification requirements for round head square neck bolts.
Why do Round Head Short Square Neck Bolts need to adhere to this standard?
A: Following this standard ensures the quality, reliability and performance of bolts that meet the needs of a variety of industrial and mechanical applications.
2.About the materials:
What material are used for the round head carriage bolt?
Answer: According to ASME B18.5.2.1M standard, round head carriage bolt can be made of various materials, such as carbon steel, stainless steel, etc. The specific material depends on the application requirements and environmental conditions.
What are the mechanical characteristics of these materials?
A: The mechanical properties of the material, such as tensile strength, yield strength, hardness, etc., meet the standards to ensure that the bolts have sufficient strength and durability during use.
3. Regarding surface treatment:
What treatment has been done on the surface of the Round Head Carriage Bolt?
A: The surface treatment of bolts can include galvanizing, heat treatment, etc. to improve its corrosion resistance, wear resistance and mechanical properties.
4. Regarding dimensions and tolerances:
How are bolt dimensional tolerances controlled?
Answer: We use advanced production equipment and precision measuring tools to ensure that the dimensional tolerances of bolts meet the requirements of the ASME B18.5.2.1M standard.
5. Regarding testing:
Are Round Head Carriage Bolt mechanically tested?
A: Yes, all produced bolts undergo rigorous mechanical performance testing, including tensile strength, yield strength, etc., to ensure their quality and reliability.
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