A: It depends.If we have bulk goods in stock, we can ship goods within 3 days after the QC process. If we don’t have stock, normally it takes 7-15 days for OEM samples and 20-30 days for bulk goods. If it refers to opening the new mold, it takes an extra 7-15 days to make the mold.
Triangular Thread Screw
Pan Head Tri-Lobular Thread Screws: Overview
Materials:
- Carbon steel (heat-treated for strength and hardness), stainless steel (AISI 304/316 for corrosion resistance), brass (decorative or electrical applications), or alloy steel (high-stress environments).
- Surface treatments: Zinc plating, phosphate coating, or Dacromet® for rust prevention and enhanced wear resistance.
Manufacturing Process:
- Cold Heading: Forms the pan head and shank from wire stock.
- Tri-Lobular Thread Rolling: Uses specialized dies to create the three-lobe (tri-lobular) thread profile, enabling self-tapping and vibration resistance.
- Heat Treatment: Hardens carbon/alloy steel screws (HRC 28–35) for durability.
- Surface Finishing: Electroplating or passivation to improve corrosion resistance.
Key Production Considerations:
- Thread Profile Precision: Ensure uniform lobe geometry for consistent self-tapping performance.
- Head Finish: Smooth, rounded pan head to prevent surface damage and ensure flush seating.
- Deburring: Remove sharp edges from threads and head to avoid material gouging.
- Coating Uniformity: Critical for corrosion resistance in humid or outdoor environments.
Applications:
- Automotive: Secure plastic trim, dashboards, or lightweight metal panels.
- Electronics: Fasten components in appliances, control panels, or enclosures.
- Furniture: Assemble composite boards, plastic parts, or thin metal frames.
- HVAC Systems: Attach ducting or vents with vibration resistance.
- Renewable Energy: Mount solar panel brackets or wind turbine components.
Installation:
- Tool Selection: Use a Phillips (PH2) or Pozidriv screwdriver/drill bit.
- Alignment: Position screw perpendicular to the substrate.
- Driving: Apply moderate pressure; the tri-lobular thread cuts and forms mating threads in the material.
- Torque Control: Tighten until the pan head sits flush without over-compressing the substrate.
- Speed: Use medium RPM (1,000–1,500) to avoid melting plastic or stripping threads.
Advantages:
- Self-Tapping Tri-Lobular Thread: Provides superior grip in plastics and thin metals, reducing loosening from vibration.
- Flush Finish: Pan head design distributes load evenly and maintains a clean appearance.
- Corrosion Resistance: Coated variants suit indoor/outdoor applications.
Note:
- Match screw length to substrate thickness to ensure full thread engagement.
- Avoid reusing screws in critical applications due to thread wear.
- Pre-drill pilot holes in brittle materials (e.g., ceramics) to prevent cracking.
Frequently Asked Questions
A: Normally, we make a 30% deposit after Pl confirmation and a 70% balance before shipment. lf order amountis too small, we can also change to 100% deposit in order to save bank handling charge.
A: A pre-bulk sample check can solve this problem to the largest extent. We will arrange production according to the pre-bulk sample quality standard after your confirmation of the samples.
A: We are not only a trading company but also a manufacturer. Our factory mainly focuses on mold design and quality inspection. Our bulk production may come from the factories we have worked with for a long time, and they are all ISO9001 certified. Through this cooperation model, we can not only ensure product quality and service, but also satisfy the diversified product needs of customers, and the price is more advantageous.
A: Yes,we are very glad to offer you samples.
However the express courier cost from our company to your required address will be upon your account.
Usually we use DHL, UPS, FEDEX or EMS as the courier.
It will take 3-7 days to arrive many Europe countries and North America.
Which express courier we will use, it’s up to your convenient or the express charge.
A: No,just part of our capable categories have been showed in our site.
If you are looking for relative industrial products, please feel free to contact us.
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