China Hex Head Self Drilling Roofing Screws

Production Description:

Head Type	Countersunk/Wafer/Truss /Hex Washer / Pan Framing Head
Thread Type	AB Type Thread
Drive type	Pozi/Phillips/ Slotted Drive
Diameter	M3.5(#6) M3.9(#7) M4.2(#8) M4.8(#10) M5.5(#12) M6.3(#14)
Length	From 19mm to 254mm
Material	1022A
Finish	Yellow/White Zinc Plated; Nickel Plated; Dacromet; Ruspert

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Product Detail

Product Tags

Product Features

1. Self-tapping screws have various names. They’re often called metal screws, sheet metal screws, tapping screws, or tapper screws.

2. Their tips come in different shapes: pointed (like a pencil), blunt, or flat, and they are described as thread-forming, thread-cutting, or thread rolling. If the screw is pointed, it will be thread-cutting – tapping and creating threads in a pre-drilled hole. If the tip is flat, it is thread-rolling – rolling or extruding threads and creating zero clearance between screw and material.

3. Self-tapping screws for plastic joining is reliable if used properly.

4. They are cheap compared to other means of joining.

5. Easily disassembled.

6. It doesn’t require pre-moulded threads.

7. Good impact and vibration resistance.

8. No curing time or settling time to achieve full strength.

9. No special tool required.

Our Advantages

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.

Product Parameter

Size(mm)	Size(inch)	Size(mm)	Size(inch)	Size(mm)	Size(inch)	Size(mm)	Size(inch)
3.5*13	#6*1/2	3.5*65	#6*2-1/2	4.2*13	#8*1/2	4.2*102	#8*4
3.5*16	#6*5/8	3.5*75	#6*3	4.2*16	#8*5/8	4.8*51	#10*2
3.5*19	#6*3/4	3.9*20	#7*3/4	4.2*19	#8*3/4	4.8*65	#10*2-1/2
3.5*25	#6*1	3.9*25	#7*1	4.2*25	#8*1	4.8*70	#10*2-3/4
3.5*29	#6*1-1/8	3.9*30	#7*1-1/8	4.2*32	#8*1-1/4	4.8*75	#10*3
3.5*32	#6*1-1/4	3.9*32	#7*1-1/4	4.2*34	#8*1-1/2	4.8*90	#10*3-1/2
3.5*35	#6*1-3/8	3.9*35	#7*1-1/2	4.2*38	#8*1-5/8	4.8*100	#10*4
3.5*38	#6*1-1/2	3.9*38	#7*1-5/8	4.2*40	#8*1-3/4	4.8*115	#10*4-1/2
3.5*41	#6*1-5/8	3.9*40	#7*1-3/4	4.2*51	#8*2	4.8*120	#10*4-3/4
3.5*45	#6*1-3/4	3.9*45	#7*1-7/8	4.2*65	#8*2-1/2	4.8*125	#10*5
3.5*51	#6*2	3.9*51	#7*2	4.2*70	#8*2-3/4	4.8*127	#10*5-1/8
3.5*55	#6*2-1/8	3.9*55	#7*2-1/8	4.2*75	#8*3	4.8*150	#10*6
3.5*57	#6*2-1/4	3.9*65	#7*2-1/2	4.2*90	#8*3-1/2	4.8*152	#10*6-1/8

Production Technology

Self Tapping Screw:

1. 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. What kind of effects will these three methods produce?

2. 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.

3. 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.

4. 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.

Production Process

Wire Drawing

Head Punching

Thread Rolling

Heat Treatment

Finish Treatment

Quality Test

Packing

Container Loading

Shipment

Factory Introduction and Advantages

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.

Research and Development Capabilities

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.

Application

Self-tapping screws are good for use with metals, various types of plastics (plywood, fiberglass, polycarbonates), and cast or forged material, like iron, aluminum, brass or bronze. Self-tapping screws also work for surfaces where you can’t secure the rear end with a nut. Common applications include fastening aluminum sections, attaching metal brackets onto wood, or inserting screws into plastic housings.

Details

China Manufacturer Hex Head Self Drilling Roofing Screws2

China Manufacturer Hex Head Self Drilling Roofing Screws3

Package and Transport

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.

FAQ

1.what is a self tapping screw?

"Self tapping screws, Self-tapping screws have a wide range of tip and thread patterns, and are available with almost any possible screw head design. Common features are the screw thread covering the whole length of the screw from tip to head and a pronounced thread hard enough for the intended substrate, often case-hardened via heat treatment process.

We can name the following screws according to head.

Bugle, CSK, Truss, Pan, Hex, Pan framing self tapping screws.

We can name the following screws according to point.

Sharp, type 17 cutting, drill, spoon point self tapping screws."

2.how do self tapping screws work?

You can fasten board to wood or metal via driver, you also can fasten metal to metal via driver.

3.what does a self tapping screw look like?

Self tapping screws look like screws, there are different head or points like CSK, bugle, truss, pan, Hex head.

4.what are self tapping screws used for?

You can fasten board to wood or metal, you also can fasten metal to metal.

5.how to remove self tapping screws?

You can remove self tapping screws via driver.

6.are self tapping screws good for wood?

yes, coarse thread drywall screw, chipboard screw, timber screws, hex head self tapping screw with sharp point, hex head self tapping screw with spoon point, hex head self tapping screw with drill point.

7.how are self tapping screws measured?

You can measure self tapping screw via calipers.

8.how much weight can a self tapping screw hold?

Self tapping screws of different sizes are different holding weight.

9.how to use self tapping screws without a drill?

You can use self tapping screws without a drill via driver to less than 3mm thickness metal.

10.what are self tapping deck screws?

Self tapping deck screws mainly are used for fastening decking material.

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