China Suppliers Factory Stainless Steel 304 Self Tapping Screws Phillips Pan Head M3 M4 Class 8.8 for Electronics
Self tapping screws are pretty simple. You drive them into a hole and they cut their own thread as they go. No need to tap the hole first. That saves time on the assembly line.
How They Work
The tip is sharp and has cutting edges. As you turn the screw, it digs in and forms its own thread. You still need a pilot hole, but that is it. No extra step.
Head Styles
Thread Types
Fine thread screws grip better in thin metal and hard plastic. More threads per inch means harder to pull out.
Coarse thread screws are for softer stuff like wood and plastic. They bite in faster.
Materials
Stainless steel resists rust. Good for outdoor use or wet areas.
Brass looks good and does not rust. Also non magnetic. Works well for electronics and fixtures where appearance matters.
Galvanized screws have a zinc coating. Decent rust protection for outdoors without spending too much.
Black oxide gives you a matte black finish. Mainly for indoor use. Cuts down on glare.
Aluminium screws are light and non magnetic.
Sizes & Strength
Metric sizes from M2 up to M6. Lengths from 6mm to 50mm. Need something different? Just ask.
Strength: Class 4.8 for everyday jobs. Class 6.8 when you need more strength. Class 8.8 for heavy work. Class 10.9 and 12.9 for the tough stuff.
Where People Use Them
Electronics cases. Wood furniture. Trailer floors. Plastic boxes. Sheet metal. Car interior trim. Signs. Anywhere you need to put screws in fast without pre tapping.
Quality Assurance
We check threads and hardness on every batch. Custom sizes and head styles available if you need something special. Bulk pricing and direct shipping worldwide.
- Cuts own thread when driven in
- No pre drilling needed — saves time
- Flat head sits flush with surface
- Wafer head low profile wide clamp
- Fine thread for thin metal and hard plastic
- Stainless steel, brass, galvanized, aluminium
- Metric M2 to M6 — Class 4.8 to 12.9
YH Fastener has over 10 years of experience manufacturing precision fasteners in Guangdong, China. We specialize in self tapping screws, machine screws, shoulder screws, captive screws, and custom fasteners. ISO 9001 and ISO 10012 certified. Every batch undergoes thread gauging, dimensional inspection, and hardness testing. Factory direct prices. Ship to over 60 countries.
For inquiries, please send us your drawing or sample. We will reply with a competitive quote within 24 hours. OEM and custom orders welcome.
Frequently Asked Questions
Q What is the difference between a self tapping screw and a regular screw?
A regular screw requires a pre-tapped hole with matching threads already cut into the material. A self tapping screw has a sharp cutting tip that forms its own threads as it is driven in, eliminating the need for a separate tapping step and saving significant assembly time.
Q Do self tapping screws need a pilot hole?
Yes, a pilot hole is still recommended. The pilot hole guides the screw and prevents the material from cracking or splitting. The diameter of the pilot hole should be slightly smaller than the screw's outer thread diameter so the screw can cut and grip the material properly.
Q Which material is best for outdoor self tapping screws?
Stainless steel is the top choice for outdoor or high-moisture environments because it offers excellent corrosion resistance. Galvanized screws with a zinc coating are a cost-effective alternative for general outdoor use where maximum corrosion resistance is not critical.
Q What metric sizes are available and what strength classes do you offer?
YH Fastener supplies self tapping screws in metric sizes from M2 to M6, with lengths ranging from 6mm to 50mm. Strength classes available include 4.8, 6.8, 8.8, 10.9, and 12.9. Custom sizes outside this range can also be manufactured upon request.
Q Can I order custom head styles or special finishes?
Yes. YH Fastener accepts OEM and custom orders. You can specify head style (flat, wafer, pan, or others), finish (stainless, brass, galvanized, black oxide, aluminium), thread type, and dimensions. Simply send your drawing or sample and we will provide a quote within 24 hours.
Q How does YH Fastener ensure product quality?
Every production batch goes through thread gauging, dimensional inspection, and hardness testing before shipment. YH Fastener is ISO 9001 and ISO 10012 certified, ensuring consistent quality standards across all products. With over 10 years of manufacturing experience, we ship to more than 60 countries worldwide.