Class 4.8 8.8 10.9 12.9 Blue Zinc PlatedCross Recessed Countersunk Head Drilling Screws
Price:
0.05USD-0.15USD
MOQ:
10pcs
Delivery Time:
15days
Brand:
JIA SHAN
Product Description
Class 4.8 8.8 10.9 12.9 Blue Zinc Plated Cross Recessed Countersunk Head Drilling Screws
Product Specifications
| Attribute | Value |
|---|---|
| Name | Metal Screw |
| Standard | DIN, ASME, ANSI, ISO |
| Material | Steel, Stainless steel, Brass, Copper, Titanium Alloy, Plastic |
| Place of Origin | China |
| Finish | Polish, Passivation, Black, Galvanization, Chromate, Dacromet |
| Certificate | ISO9001:2008, ROHS |
| Used | Building Industry Machinery |
| Thread Type | Coarse, Fine |
| Usage | Fastening |
| Function | Connection, Fastening and Decoration |
| Strength | High |
| Size | Various sizes available |
| Measurement System | INCH, Metric system |
Product Description
These drilling screws feature a countersunk head with cross recess and a drilling tail design. Compared to ordinary screws, they offer superior hardness, better retention, and firmer connections. The drilling tail allows direct installation without pre-drilling, significantly improving work efficiency.
Applications
| Automotive | High-strength applications including automotive engines, heavy-duty machinery, and bridge construction, preferred for their larger support area and better anti-loosening performance. |
| Mechanical | Used in mechanical, electronic, automotive, and construction fields to connect various mechanical parts, circuit boards, engines, transmissions, and building structures. |
| Energy | For connecting power generation equipment and transmission lines in the energy industry. |
| Architectural | Used in construction engineering, shipbuilding, and petrochemical industry to connect building structures, improve ship navigation safety and stability, and ensure petrochemical equipment safety. |
Screws are indispensable in daily life and industrial manufacturing, often called "industrial rice." Their applications include electronic products, mechanical products, digital products, power equipment, ships, vehicles, water conservancy projects, and chemical experiments.
Material Specifications
| Aluminum | Excellent thermal and electrical conductivity but naturally soft. May produce gelatinous buildup after processing. |
| Titanium | EDM machining is well suited for titanium. Requires deionized water as a medium to control heat during processing. |
| Steel | Very strong metal. Generates significant heat during processing requiring precautions. |
| Brass | High tensile strength and easy to machine, but requires slow cutting speed due to softness. |
Features & Advantages
- Corrosion resistance: Surface treatments isolate metal from corrosive environments
- Wear resistance: Durable materials and finishes ensure long service life
- High hardness: Superior strength compared to standard screws
- 316/316L variants: Contain 2-3% molybdenum for enhanced corrosion resistance, especially in chloride environments
Product Images
Frequently Asked Questions
Are you a trading company or manufacturer?
We are factory and OEM services are available.
How long is your delivery time?
Generally 7-10 days if goods are in stock, or 15-20 days if not in stock (depending on quantity).
Do you provide samples? Is it free or extra?
Yes, we offer samples free of charge but the customer pays for freight.
What are your payment terms?
30% T/T in advance, balance before shipment or L/C.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Hunan Jia Shan Hardware Tech Co., Ltd.
Location
1st Floor,Building 8 Phase II Factory Building,No.8 Lutian Road,Lugu Base,Lugu Street,Xiangjiang New Area,Hunan Province.Postal Code:410205
Contact Person
Tan