The button head and semicircular head American machine screw is a standard fastener that combines multiple features. The following is a detailed description of its customization requirements, with clear content structure and highlighted key points.
1. Basic parameter requirements
Standard: American standard.
Head type: button head or semicircular head, needs to be selected.
Thread type: machine thread, American UNC/UNF series.
Dimensions
Diameter: need to mark American number or inch value.
Length: inch system, need to specify whether the head height is included.
Material: stainless steel 304 or 316, carbon steel 8.8 and 12,9, or brass, etc., need to indicate surface treatment, including zinc plating, nickel plating, passivation, etc.
2. Key customization details
Thread accuracy: specify tolerance grade.
Head groove type: cross groove, slot, hexagonal groove, etc.
Head height and curvature: provide drawings or reference standards.
Special requirements: non-standard size, such as extended rod, shortened thread segment; additional anti-loosening design can also be added, such as nylon washers, thread glue pre-coating, special surface treatment can choose Dacromet or hot-dip galvanizing, etc.
3. Materials and performance
Mechanical properties: tensile strength, hardness.
Environmental adaptability: salt spray test duration, high temperature/low temperature requirements.
4. Packaging and labeling
Packing method: roll packaging, box packaging, or customized pallet, marking the quantity per package.
Label content: The laser engraving on the head can have material grade, factory label, outer box label, including batch number and specification.
5. Quality control
Testing standards: Provide a full inspection report, including size, thread gauge test, and hardness sampling.
Certification requirements: such as RoHS, ISO 9001, ASTM/FED standards.
6. Delivery time and quantity
MOQ: Usually 5,000 pieces, small batches need to be negotiated.
Delivery cycle: mold development takes 7-15 days, mass production takes 2-4 weeks.
Notes
Distinguishing between the American and metric systems: avoid confusing units.
Non-standard design: It is recommended to provide physical samples or 3D models to reduce errors.
Through the above design characteristics and matching of working conditions, this type of screw achieves a balance between strength, weather resistance and installation efficiency, and is the preferred fastening solution for heavy industry and precision equipment.
