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.
Pan head self-tapping screw
Pan Head Self-Tapping Screws: Overview
Materials:
- Carbon steel (heat-treated for hardness), stainless steel (AISI 304/316 for corrosion resistance), or brass (non-sparking, decorative applications).
- Surface treatments: Zinc plating, phosphate coating, or powder coating for rust prevention and aesthetics.
Manufacturing Process:
- Cold Heading: Forms the pan head and shank from wire stock.
- Thread Rolling: Creates sharp, self-tapping threads for material penetration.
- Heat Treatment: Hardens carbon steel screws (HRC 28–35) for durability.
- Surface Finishing: Electroplating or passivation to enhance corrosion resistance.
Key Production Considerations:
- Thread Geometry: Sharp, tapered threads to cut into materials without pre-drilling.
- Head Finish: Smooth, rounded pan head to prevent surface damage and ensure flush seating.
- Point Design: Sharp or blunt tip (Type A/B) tailored to substrate hardness (e.g., metal vs. plastic).
- Coating Uniformity: Critical for corrosion resistance in outdoor/humid environments.
Applications:
- Electronics: Secure casings, heatsinks, or circuit boards in devices.
- Construction: Fasten metal sheets, HVAC ducts, or lightweight framing.
- Automotive: Assemble interior trim, panels, or plastic components.
- Furniture: Join wood, particleboard, or composite materials.
Installation:
- Tool Selection: Use a Phillips (PH2) or Pozidriv screwdriver/drill bit.
- Alignment: Position screw perpendicular to the substrate surface.
- Driving: Apply steady pressure; the self-tapping thread will cut into the material.
- Stop Point: Tighten until the pan head sits flush without over-compressing the substrate.
- Speed: Moderate RPM (800–1,200) to avoid stripping threads in brittle materials (e.g., plastic).
Advantages:
- Self-Tapping Design: Eliminates need for pre-drilled holes.
- Wide Bearing Surface: Pan head distributes load evenly, reducing substrate damage.
- Versatility: Compatible with metal, plastic, wood, and composites.
Note:
- Avoid reusing screws in load-bearing applications due to potential thread wear.
- Match screw length to substrate thickness to ensure full thread engagement.
- Use stainless steel screws in coastal or chemical-exposure environments.
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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