Cheapest Price Round Head Self Drilling Screw - 3.5X10mm Hexagonal Head Drill Point Screw White Zinc Plated Self Drilling Screws – Xinruifeng

1. A self-drilling screw is a type of tool that has the same design features as a drill bit or cutting tool. As the name implies, self-drilling screws do not require a pilot hole in order to perform as a fastener.

2. Their function is governed by the same rules that apply to cutting tools, which are speed of cutting, feed rate, depth of required cut, and type of material to be connected. They are designed to work on soft steel, wood, and metals.

3. The types and varieties of self-drilling screws makes them applicable to a variety of construction and fabricating operations. From applying metal roofing to finishing assemblies, self-drilling screws have become a valuable tool in manufacturing, fabrication, and production.

4. The Hex Head Self Drilling/Tapping Screw is also known as Roofing Screw or Metal Roofing Screw as this screw is especially used for attaching metal roof panels to the building structure, whether steel or wood substrates. 

Tianjin Xinruifeng Technology Co., Ltd. has been in the fastener industry for nearly 20 years and we can customize all kinds of products per your requirements. We have an established management system and quality control procedure. Excellent quality, competitive price, and timely delivery are the pillars of the company’s foundation. Win-win and long-term cooperation is our final goals when dealing with different clients.

● Heat treatment: It is a method of heating steel to different temperatures and then using different cooling methods to achieve different purposes of changing the properties of steel. The commonly used heat treatments are: quenching, annealing, and tempering.

● Quenching: A heat treatment method in which the steel is heated to above 942 degrees Celsius to make the steel crystals in austenitic state, and then immersed in cold water or cooling oil to quench to make the steel crystals in a martensitic state. This method can increase the strength and hardness of the steel. There is a very big difference in the strength and hardness of the steel with the same label after quenching and without quenching.
● Annealing: A heat treatment method in which the steel is also heated to an austenitic state and then naturally cooled in air. This method can reduce the strength and hardness of the steel, improve its flexibility, and facilitate processing. Generally, steel will go through this step before processing.
● Tempering: Whether it is quenched, annealed or press-formed, steel will generate internal stress, and the imbalance of internal stress will affect the structure and mechanical properties of the steel from the inside, so a tempering process is required. The material is kept warm continuously at a temperature of more than 700 degrees, its internal stress is changed and then cooled naturally.

In 2008, Tianjin Xinruifeng Technology Co., Ltd. was established in the beautiful coastal city of Tianjin. After more than a decade’s development, now we are a leading, professional and premium manufacturer with excellent capabilities of design, development, production and export. Our main products include drywall screws, chipboard screws, self-drilling screws and self-tapping screws, which are produced in 3 different production bases with a total area of 16,000 square meters. 

We have 280 sets of automatic production equipments, including wire drawing machines, cold-heading machines, thread rolling machines, tailing machines and heat-treatment lines. There are more than 100 staff in our company. Among them, there is an experienced and professional R&D team, who follow an established management system and quality control procedure, allowing us to customize the products according to your specific designs/requirements to the highest quality. Further, we have CE Certification for drywall screws and SGS will conduct audit to our factory on a regular basis. Because of this and our great attention to high quality, there is not a single complaint about quality in the last 5 years. 

1. To satisfy the demands from markets and customers, we have more than 300 machines in two shift production in order to provide all kinds of fasteners in the market home and abroad.

2. To prevent any mistakes from happening during the developement, the development procedure is strictly controlled under ISO 9001. From design → information collection → setting developing items → design input → design output → pilot run → design verification → mass production, every stage is strictly inspected & controlled by our R&D team. Based on the precise control from research, drawing, pilot run management and design change, the development will be cost effective and efficient.

Roofing
Self-drilling screws for metal roofing are specially designed with a washer to form a tight seal when fastening. As with all self-drilling screws, they have a drill bit formed point that makes inserting them quick and easy.

Sheet Metal
Metal sheets are used to frame a wide variety of products. To speed up the production process and ensure tight connections, self-drilling screws are used as fasteners. The drill-like tip of self-drilling screws is preferred over other methods of fastening due to its efficiency. Industries that use self-drilling screws for metal fastening include automobile construction, building, and furniture manufacturing.
The design and construction of self-drilling screws allows them to pierce 20 to 14 gauge metals.

Framing
Self-drilling screws for framing must be able to cut through heavy duty metal studs. They have special heads designed to decrease driving torque but have exceptional holding strength. They are capable of driving through metals of up to 0.125 inches thick with an RPM rate of 1500. They come in a variety of metals to fit the operation and application.
Regardless of if the material to be drilled is metal lathe or heavy gauge metal (between 12 to 20 gauge), self-drilling screws can easily connect and frame a structure.

Drywall
The unique feature of drywall self-drilling screws is their countersink head that neatly fits into the drywall without tearing or damaging the paper and avoids head pops. They are generally coated for interior applications and come in numbers 6, 7, 8, and 10 diameters. They are flexible enough to be attached to wood or metal studs and include rolled threads for added strength and holding power.

Woven bag, carton, color box+ color carton, pallet etc (per customer’s request).

Generally, the production will take 4-5 weeks for one container. Please check details with us when you have a specific quantity. As a factory, we can guarantee the timely delivery of your order and will try out best to meet your tight deadline. Normally, the shipments will depart from Tianjin Port.

Q1: Are you a trading company or manufacturer?
A1: We are the manufacturer and have a professional sales team to serve you.

Q2: What is your terms of payment?
A2: 30%T/T in advance, balance before shipment. And we also can accept L/C at sight.

Q3. Can you provide a sample?
A3: Yes, We can supply sample for free and you only need to bear the freight cost.

Q4. Can you provide Test Report?
A4: Yes, we can provide our Test Reports for you. Or, you can ask a third party like SGS, BV etc to conduct quality test for you.

Q5: Can you provide Technical support and After sales service?
A5: Yes, we can provide you the technical support and after-sales service if needed.

Q6: How can we know more about your factory?
A6: You can follow our YouTube, Linkedin, Facebook and Twitter for updates.

Q7: How can we contact you?
A7: You can contact us via Phone, Email, WeChat, Whatsapp, Skype, Made-in-China Message and etc any time.