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.
Countersunk Head Screw
Countersunk Screws: Overview
Materials:
- Stainless steel (AISI 304/316 for corrosion resistance), carbon steel (heat-treated for strength), alloy steel (high-stress applications), or titanium (lightweight, aerospace use).
- Surface treatments: Zinc plating, black oxide, or anodizing for durability and rust prevention.
Manufacturing Process:
- Cold Heading: Forms the screw head and shank with a conical (countersunk) shape.
- Thread Rolling: Creates sharp, self-tapping or machine threads.
- Heat Treatment: Hardening and tempering (for steel screws) to enhance strength.
- Surface Finishing: Coatings applied via electroplating or chemical processes.
Key Production Considerations:
- Head Angle Precision: Ensure a consistent 82° or 90° cone angle for flush seating.
- Thread Quality: Sharp, burr-free threads to prevent material damage during installation.
- Surface Finish: Smooth head surface to avoid friction and ensure aesthetic alignment.
- Dimensional Tolerance: Tight control of head diameter and thread pitch for compatibility with countersunk holes.
Applications:
- Furniture: Assemble wooden tables, cabinets, or flooring for a seamless finish.
- Automotive: Secure interior panels, trim, or lightweight components.
- Aerospace: Fasten composite panels or structural components requiring aerodynamic surfaces.
- Construction: Install metal framing, drywall, or roofing sheets.
- Electronics: Mount components in devices where protruding screws are undesirable.
Installation:
- Pre-Drilling: Create a countersunk hole matching the screw’s head angle and diameter.
- Tool Selection: Use a Phillips (PH2), flathead, or Torx driver, depending on screw design.
- Alignment: Insert the screw at the correct angle to ensure the head sits flush.
- Tightening: Apply moderate torque to avoid stripping threads or over-sinking the head.
- Final Check: Verify the screw head is level with or slightly below the surface.
Advantages:
- Aesthetic Finish: Eliminates protrusions for smooth, safe surfaces.
- Aerodynamic Profile: Critical in automotive and aerospace applications.
- Space Efficiency: Ideal for tight spaces where protruding hardware is impractical.
Note:
- Always match the screw’s head angle to the countersunk hole (e.g., 82° vs. 90°).
- Avoid reusing screws in load-bearing applications due to potential thread wear.
- Use threadlockers in high-vibration environments to prevent loosening.
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.
Get Quote Now!
Welcome to discuss your purchasing requirements with our customer service.
