YOUR ONE-STOP SOLUTION SELF DRILLING SCREWS
MANUFACTURER
Sinsun manufactures high-quality self-drilling screws to provide customized services for different types of customers, such as hexagonal self-drilling screws, countersunk self-drilling screws, washer head self-drilling screws and pan head self-drilling screws, etc., according to the construction objects and building environments. Over the years, we have enjoyed a good reputation in the industry and are worthy of your trust. We provide a wide range of self-drilling screws worldwide at affordable prices
Sinsun Fastener focuses on the research and development, production and sales of self-tapping screws. With technological innovation and rigorous quality control, it provides efficient fastening solutions for global customers.
- The company produces a full range of self-tapping screws, covering a variety of materials such as carbon steel, stainless steel, alloy steel, etc., with complete product specifications (such as CSK Head, hexagonal head, pan head, etc.), and supports surface treatment processes such as anti-corrosion coating, electroplating, and Dacromet.
- Sinsun implements strict quality control and certification guarantees. The production line is equipped with automated testing equipment to ensure that the products meet international standards such as DIN, ASTM, and JIS, and pass salt spray tests, torque tests, etc.
- Customized services, providing non-standard size customization, exclusive logo engraving, packaging and sub-packaging optimization, etc.
Features Of Self-Drilling Screws
Sinsun can provide the most suitable self-drilling screws for your engineering and construction projects.
- Drilling design The tip is integrated with the drill bit structure (common #3/#4/#5 drill tip) No need to pre-drill, directly penetrate the metal
- Groove design The tail has 1-2 chip grooves (depth 0.3-0.8mm) to discharge the metal debris generated by drilling and avoid jamming
- Thread type Coarse thread (pitch 1.5-2.5mm) Improve chip removal efficiency and reduce penetration resistance
High Quality Raw Materials Ensure The Quality Of Your Self Drilling Screws
- The performance of self-drilling screws is highly dependent on the selection of raw materials. Its core indicators such as drilling ability, tensile strength, and corrosion resistance are directly related to the material.
- Sinsun selects domestic first-class quality Xingtai steel raw materials. Carbon Stee has a C content of 0.1%-1.2%, and contains Mn/Si strengthening elements. The tensile strength is ≥800MPa (8.8 grade)
- Carbon steel hardness control: The hardness needs to be adjusted to 28-32HRC through heat treatment (quenching + tempering).
Self Drilling Screw Series
Tek Screws
Professional self-drilling screws with stepped drill tip design are optimized for penetrating medium and thick metal plates and are suitable for steel structures and industrial scenes.
Stainless Steel Self Drilling Metal Screws
304/316 stainless steel self-drilling screws are corrosion-resistant and rust-resistant, suitable for harsh metal substrate environments such as chemical and coastal areas.
Self Drilling Wood Screws
Sharp self-tapping threads + blunt drill tip, to achieve one-step penetration and fastening of wood to wood/thin metal, without pre-drilling.
Self Drilling Metal Screws
Carbon steel galvanized universal self-drilling screws, economically and efficiently solve the connection needs of thin metals such as color steel plates and light steel keels
Flat Head Self Drilling Screws
Flat head hidden design, surface flush installation, suitable for aesthetically sensitive scenes such as metal doors and windows, decorative panels, etc
Countersunk Self Drilling Screws
Countersunk structure + self-drilling function, pre-embedded anchoring metal plates, reducing safety hazards caused by protrusions.
Wafer Head Self Drilling Screws
thin flange pan head design disperses pressure while saving space, commonly used for fixing solar panel brackets and thin-walled metal.
Hexagon Self Drilling Screw
The hexagonal head is suitable for electric wrenches, with high torque to penetrate multiple layers of metal plates, specially designed for heavy-duty mechanical assembly.
Pan Head Self Drilling Screws
The dome flat head structure combines aesthetics with anti-slip performance, and is mostly used for light metal splicing such as electrical housings and chassis.
White Self Drilling Screws
White epoxy-coated screws, color matching PVC/plastic steel building materials, meet the visual unification requirements of outdoor guardrails, awnings and other scenes.
Large Self Drilling Screws
Large diameter (M6+) long specification self-drilling screws, penetrate 12mm+ metal plates or composite sandwich structures, suitable for heavy infrastructure.
Wood To Metal Self Drilling Screws
The two-stage drill tip design, the front end penetrates the metal layer, and the rear end thread bites the wood, specializing in the mixed connection of wood structures and metal substrates.
- Rust-Proof And Durable, No Loosening Or Falling Off
- Dacromet Coating Protection, Salt Spray Test 1000 Hours
- 19 Years Of Professional Manufacturing, Your First Choice For Screws
Surface Treatment Of Self Drilling Screws
The surface treatment of self-drilling screws is the main factor affecting the quality of the screws. The surface treatment directly affects the corrosion resistance and durability of the screws. Choose the appropriate surface treatment according to your application requirements. The following are the most common surface treatment types of Sinsun Fastener. We can also customize the surface treatment according to your needs.
Zinc Plated Self Drillng screw
- Electroplating zinc is the most commonly used coating for all fastener products
- Process: A layer of zinc (4–8 μm) is deposited on the screw surface by electrolysis
- Advantages: low cost, bright appearance, can be passivated (such as blue-white zinc, colored zinc) to improve corrosion resistance.
Phosphated Self Drilling Screw
- Phosphating is cheaper than Zinc ,it is suitable for environments with low corrosion resistance
- Improved anti-rust ability (short-term protection, salt spray test about 72 hours)
Dacromet Self Driiling Screw
- Process: Chromium-free coating containing zinc, aluminum flakes, chromic acid, cured by baking (coating 8–12 μm)
- There is no hydrogen embrittlement problem, and the torque-preload consistency is very good
- High-strength fasteners for high corrosion protection requirements
Ruspert Self drilling Screw
- Hot Rust is a coating for building screws. Its main performance is strong corrosion resistance.
- Salt spray test: 500–1500 hours (adjusted according to coating thickness and process)
- Color customization (multi-color) can be achieved by adding color paste or surface coating technology to achieve color diversification (black, blue, green, etc.)
Color Head Self Drilling Screw
- Color head self tapping screws are screws with a colored coating applied only on the screw head.
- Various colors: Customized colors (such as RAL color cards) are supported.
- Low cost: Only local processing is performed to save materials.
Black Oxide Self Drilling Screw
- Black Oxide It is a popular coating for industrial fasteners because it is the cheapest
- Process: Black oxide film (1–2μm) is generated on the surface.
- Advantages: Beautiful, rust-proof (needs oiling for enhancement).
- Applications: Tools, decorative fasteners.
Sinsun Fastener
Production Process Of Self Drilling Screws
The choice of surface treatment for screws depends on the environment in which your project is used and your budget. Generally speaking, the most economical and affordable phosphating can be used for indoor Huajing. If the environment requires corrosion resistance and rust prevention, you should choose a more advanced surface treatment such as Dacromet and Ruspert
- The wire is spheroidized annealed (hardness ≤ 72HRB) which increases the cold heading efficiency by 20%
- The pickling process removes the oxide layer and stains on the wire surface by chemical methods, making the wire surface smoother and more beautiful.
- The hot-rolled wire (diameter 5.5-20mm) is stretched to the target diameter (such as 3.5-6.3mm) through multiple passes of the die, and the tolerance can be controlled within **±0.01mm**.
- Ensure that the material is filled evenly during the subsequent cold heading and reduce the risk of head cracking.
- Sinsun uses Taiwan (Sijin) or Germany (Nedschroef) equipment, 8-station continuous molding, tolerance control ±0.02mm
- Cutting: Servo precision cutting
- Preliminary upsetting: Preforming drill tip profile
- Fine upsetting: Forming hexagonal flange head and thread blank
- Thread forming:
Use planetary thread rolling machine (Hatebur, Switzerland) to press out specific threads according to different types of self-drilling screws, with rolling force ≥12 tons, ensuring that each thread reaches ISO 4g level precision
- Drill tail shaping:
- Based on the different requirements of screws, further shaping the drill tail, the drill tail can be shaped and reduced, #1 drill tail, #2 drill tail, #3 drill tail, #4 drill tail, #5 drill tail and tail with wings
- Carburizing and quenching: continuous treatment in mesh belt furnace (carbon potential 0.8%C), surface hardness 52-56HRC, core maintains 30-35HRC.
- Tempering: 280℃×2h, eliminate internal stress, toughness increased by 40%.
- Galvanizing Alkaline galvanizing (zinc layer 8-12μm) + color passivation Salt spray test ≥48H
- Dacromet Chromium-free coating (thickness 6-8μm), sintering temperature 300℃ Salt spray resistance ≥500h
- Phosphating Zinc phosphating (film weight 2-4g/m²) + sealing treatment Friction coefficient reduced to 0.08-0.12
- Visual inspection: real-time monitoring of thread integrity and screw head forming rate
- Spectral analysis : material composition deviation ≤±0.5%
- Drilling force test: simulated penetration of 4mm Q235 steel plate (rotation speed 1500rpm, axial force ≤150N)
- Torque test: dynamic monitoring of installation torque
Sinsun packs screws according to your needs:
1. Small boxes with color printing + cartons with color printing (100PCS-1000PCS/BOX)
2. Neutral packaging white cartons, it is print or paste color content
3. Bulk carton packaging, 20-25 kg
4. Bulk bag packaging 25 kg per bag
PREMIUM LABORATORY FACILITY
Sinsun has a variety of advanced screw testing equipment that can test the physical properties, chemical properties, surface treatment and functionality of screws.
For example, a tensile testing machine is used to test tensile strength and yield strength, while a metallographic microscope is used to observe the structure of a material and detect the effects of heat treatment.
Physical Properties Testing Equipment
Sinsun guarantees that every screw we provide to you complies with the ISO 898-1 test standard, and uses a tensile testing machine to test the tensile strength, yield strength and elongation at break of the screw.
Rockwell hardness tester: quickly measure the surface hardness of screws (HRC/HRB).
Vickers hardness tester: detect the hardness of small areas (such as thread tips, heat treatment layers, etc.)
Tensile Testing Machine
Hardness Tester Of Screw
Torque Tester For Screw
Metallographic Microscope
Chemical Performance Testing Equipment
The self drilling screws you need have been tested in our factory and will not be shipped to you until there are no quality problems.
Salt spray test machine simulates marine or industrial atmospheric environment to test the corrosion resistance of screws.
Spectrum analyzer, quickly analyze the chemical composition of screw materials (such as C and Mn content of carbon steel)
Salt Spray Test Machine
Spectrum Analyzer
Coating Thickness Gauge
Hydrogen Embrittlement Tester
Sinsun Self Drilling screw Package
The box + carton packaging method for self-drilling screws is the most commonly used packaging method and has the highest cost performance.Like Pan Head Self Drilling, 200 PCS/box, 500 PCS/box, 1000 PCS/box
1.The inner packaging is a colorful 3-layer high-quality corrugated paper box,Outer packaging carton 5 layers of corrugated paper .Like Hex self drilling Screw 200PCS/Box,300 PCS/Box,500PCS/Box
2. Neutral packaging white and small box + outer carton .Suitable for customers who have small order quantity but need Box packaging
3. Brown small box + outer Carton,Can print logo name specifications, suitable for customers who like simplicity and environmental protection
1. Carton specifications and loading design
Package by piece:
Suitable for small-volume retail or precise counting needs (such as 1000/2000 pieces per box).
Package by kilogram:
Common method for industrial customers (18-25kg/box), the total weight after packing must not exceed 25kg (in line with manual handling standards).
2. Internal moisture-proof and protection design
Moisture-proof bag selection:
Use transparent PE moisture-proof bags or VCI gas phase anti-rust bags (rust-proof + moisture-proof dual functions), thickness ≥ 0.08mm.
Short screws (such as ≤30mm) can be directly bulked without additional filling.
- For buyers who need large quantities of self-drilling screws or customers who receive their own goods and customize the packaging, 25 kg bulk self-drilling screws are a cost-effective and convenient packaging option.
Material: Double-layer polypropylene woven cloth (PP woven bag)
Woven from polypropylene (PP) flat wire, it has high tensile strength, abrasion resistance and tear resistance.
The surface may be coated (such as PE coating) to enhance waterproofness.
Features:
Strong load-bearing capacity, suitable for heavy packaging over 20-25kg.
Usually with hand straps or slings for easy handling or forklift loading and unloading.
Pallets are also a common packaging method for self-drilling screws. Adding a pallet to the outside of the carton can better protect the screws, and it is also convenient for forklift operations and storage efficiency.
- Moisture-proof and rust-proof: The carton is lined with moisture-proof material + the pallet is off the ground to avoid erosion by ground moisture.
- Strong pressure resistance: The wooden pallet packaging has wooden covers on the top and bottom, and wooden corner guards around it are suitable for vibration and stacking during long-distance transportation.
- Convenient loading and unloading and warehousing: The pallet is compatible with forklifts and improves loading and unloading efficiency.
Your Premier Screw Package Manufacturer & Supplier in China
We are your best choice for customized self-drilling screw packaging solutions. If you need some specially designed screw packaging, please send me the details and we will complete the packaging design for your confirmation at a competitive price within one day.
As one of the manufacturers of self-drilling screws in China, we have been focusing on manufacturing various standardized screws and customized packaging for more than 17 years. We have rich experience in this field and our company can complete any customized production order in a short time. Our various screws are exported to global markets such as Indonesia, Europe, and the Middle East and South America, and have won high praise from customers.
“Precise customization, born for professionalism”
“double the efficiency, making construction as fast as lightning”
“Small screws, big power，making every tightening a safety promise”
Self Tapping Screws of Application
Sinsun’s self-drilling screws have a drill-shaped tail. They are multi-purpose fasteners that combine drilling, tapping and fastening functions. They can penetrate materials and fix without pre-drilling. They are efficient and convenient, and widely used.
Self Drilling Screws For Metal
1. Self drilling screws for steel
- Metal roof and wall: fix color steel plate, galvanized steel plate (thickness 0.5-3mm).
- Light steel keel frame: connect C-shaped steel and Z-shaped steel, used for partition wall or ceiling.
- Photovoltaic support system: fix solar panel support to metal beam or concrete foundation (with anchor gasket).
2. Automobile manufacturing and repair
- Body sheet metal splicing: repair metal body panels after collision.
- Interior parts fixing: install plastic or composite panels (penetration depth needs to be controlled).
- Chassis guard: fix aluminum alloy or steel chassis guard.
Self Drilling Screws For Roofing
Hex Self Drilling screw are mostly used to Steel structure building and color steel plate installation
1. Used for the firm connection of steel beams and steel beams in steel structure buildings, C/Z steel connection: assemble steel structure frames, purlins or support beams. Ensure the stability and bearing capacity of the building structure.
2. In the installation of color steel plates, fix the color steel plates on the steel structure frame to play a role in waterproofing, windproofing and heat preservation.
Self-drilling screws can quickly fasten the color steel plates to the steel structure frame, suitable for factories, warehouses, awnings, etc.
Uses of CSk Self-Drilling Screws
CSK self drilling screw can be used for metal door and window installation, fixing the door and window frames on the reserved holes in the wall to ensure the sealing and stability of the doors and windows. It can also be used for the assembly of guardrails and shelves.
- The installation quality of metal doors and windows directly affects the sound insulation, heat insulation and waterproof performance of the house. Self-drilling screws can firmly fix the door and window frames to the wall, making the doors and windows closely integrated with the wall, reducing gaps, improving sealing, and ensuring that the doors and windows will not shake during daily use.
- Assembly of metal fences and storage shelves (such as fixing angle steel and steel mesh)
Self Drilling Screws For Structural Steel
Self driling screw can be used to install solar photovoltaic panels, fix the photovoltaic panel bracket on the roof or ground foundation to ensure the safe operation of the photovoltaic system, and can also be used for cable tray installation: fix the cable bracket or bridge to the wall or ceiling
- The self-drilling screws can firmly install the bracket on the roof or the ground, so that the photovoltaic panels can still work normally under different climatic conditions
- Cable tray installation: Fix the cable bracket or cable tray to the wall or ceiling.
- Billboard/sign: Connection between the metal frame and the base.
Self Drilling Screw For Wood
Self Drilling Screws for Wood: Efficient Fastening Without Pre-Drilling That is a fastener that combines a self-drilling drill tip with a woodworking thread design. It can directly penetrate the wood surface and complete the thread forming, eliminating the pre-drilling step and greatly improving the installation efficiency.
- Quickly assemble wooden structures (such as wooden house frames and fences): build wooden walls, floors or fences, which require high-strength connections.
- Fix thin boards and softwoods (such as plywood and pine furniture): splice laminates or fix decorative panels to avoid wood cracking.
- Penetrate multi-layer materials (such as wood + metal/plastic composite structures): fix wood and light metal brackets or plastic accessories.
Self Drilling Screws For Aluminum
Aluminum tek screws are fasteners customized for aluminum substrates. They are designed with stepped drill tips and anti-corrosion coatings to reduce burrs and oxidation risks when penetrating aluminum plates, profiles and composite structures.
- Aluminum curtain wall/ceiling installation: fix aluminum curtain wall panels and honeycomb aluminum panels to steel structures. The self-drilling function avoids surface scratches caused by pre-drilling, and the fluorocarbon coating resists UV aging.
- Aluminum alloy door and window frame assembly: connect window frame corners and aluminum profiles, passivate drill tips to reduce aluminum cracking, and sealant compatibility design to prevent water seepage and rust.
- Solar aluminum bracket system: install photovoltaic panels to aluminum rails, anodized surface treatment tolerates outdoor temperature differences, and is suitable for rapid penetration of 1-5mm aluminum plate thickness.
Sinsun coach screw's Real Customer Reviews Are Shocking!
Common Questions
The size of self-drilling screws is indicated by a specification model, which refers to their diameter, length and drill tip length, ensuring the correct selection for different materials and applications
Yes, Self drilling Screw can be used for wood, but if the material is soft, the best choice for wood is still wood screws.
Drill-like tip, similar to the point of a twist drill bit, not as sharp as a standard self-tapping screw
Self-drilling screws can be used directly without drilling holes in advance, but they need to be used with power tools with the correct bit.
No need for pre-drilling, just screw it into place, efficient self-drilling screws, saving time and effort
The load-bearing capacity of self-drilling screws is related to their specifications and length
When the hole position and depth need to be precisely controlled, wood screws are more suitable than self drilling screws when installing wood materials, and Drywall Screws are more suitable when used for gypsum boards.
The appropriate attack speed range for self-drilling screws is usually between 200 and 300 strikes per minute. This range ensures both work efficiency and accurate driving of the nails to avoid damage to the material.
Yes, self drilling screws are good screws for installing plastics. You need to be careful when installing this type of material to ensure that it does not react chemically with the plastic.
The thickness of a self drilling screw refers to the diameter of the screw. Usually the largest one is #14 which is 6.3MM.
Screws are not all self-drilling screws, there are also self-tapping screws, self-cutting screws and self-threading screws.
Yes, Self drilling Screw can go into metal, it is the best screw for Metal to Metal and Wood to Metal
If we fail to use the self-drilling screw correctly, the material will be damaged when drilling, and the hole will be too large, which will cause the screw to loosen and be difficult to fix.
Electric Screw Gun with the right size sleeve and the correct Drive type bit
The two types of screws have obvious differences in the design of the screw tail, the installation method and the usage scenarios. The self-drilling screw has a unique drilling tail design that does not require drilling during installation. It is convenient and labor-saving and can be used for the installation of a variety of materials.
