Hexagon flange bolts and half-thread carbon steel galvanized screws are a specific type of high-strength, multi-purpose fasteners. The following is a description of its product customization. It can be used as a reference when customized services are needed.
1. Basic parameter customization
Specification standards: follow GB/T 5789 or DIN 6921, but the standard version number needs to be indicated; metric or imperial can be selected, and the complete thread specifications need to be marked.
Material and strength: carbon steel, stainless steel, alloy steel, etc., the brand and surface treatment need to be specified.
Strength grade: 8.8, 10.9, 12.9 or stainless steel A2-70/A4-80.
Flange surface characteristics: The diameter needs to be larger than the standard hexagonal head size.
Anti-slip pattern: A serrated pattern or smooth surface can be selected, and the pattern requirements need to be indicated. If there is no pattern, the smooth surface needs to be indicated.
2. Structural details customization
Thread part: half-thread length is accurately marked, the thread accuracy is divided into ordinary or precision grade, and whether the go and no-go gauge detection is required is indicated.
Head and drive mode: the width and thickness of the hexagonal head size, whether it needs to be increased or reduced.
Drive compatibility: whether the hexagonal composite design is required.
Flange and contact surface
Integrated gasket: whether the flange surface is equipped with a rubber gasket or a metal gasket, and the material thickness needs to be indicated.
Chamfering treatment: whether the transition between the flange and the screw requires an R angle or a C angle.
III. Special process and inspection
Surface treatment:
Electrogalvanizing, hot-dip galvanizing, blackening, etc., and the number of hours of salt spray test are required.
Special requirements: such as no hydrogen embrittlement treatment, RoHS environmental certification.
Tolerance and inspection: The key dimensional tolerances are thread diameter and length.
Full inspection items: hardness test, torque test, and torque test data need to be provided.
4. Packaging and labeling
Packing method: bulk (plastic bag + carton), tray (PE wrapping film), or customized blister box, marking the quantity per box.
Label content: laser engraving on the head (strength grade, factory logo), outer box label (material, batch number, production date).
Through the above design combination, it is not difficult to see that this screw has achieved a balance between strength, anti-loosening and weather resistance, and is an ideal choice for heavy loads or vibration the environments. At the same time, through the above sub-item description, it can ensure that the supplier clearly understands the customization requirements and avoids communication errors.
