Cheng Hao supplies self drilling screws to distributors and construction wholesalers across Europe, North America, and Asia. Our screws combine a hardened steel drill point with a thread-forming shank to drill and tap in a single operation, eliminating the need for a pre-drilled pilot hole. The drill point number (from #1 for thin sheet metal to #5 for structural steel) determines the maximum substrate thickness the screw can penetrate, and we supply across the full range to match your end applications.
Standard configurations include hex washer head and pan head in Phillips or square drive, in carbon steel with zinc electroplating as the most common finish, with stainless steel (304 or 316) and high-performance NSSC 550 duplex stainless steel available where corrosion resistance is a specification requirement. We can supply screws capable of driving through up to 5mm stainless steel plate or 13mm mild steel plate. All orders are produced to your specification with custom thread pitch, head geometry, point number, coating, and packaging available for OEM and private label supply. Production is ISO 9001 certified.
We manage the production and quality inspection of all our self-drilling screw orders closely, and we can also accommodate customer quality requirements to meet your local regulatory needs.
To ensure the highest stable product quality, all our manufacturing facilities have extensive quality inspection systems and processes that we confirm and monitor for every shipment.
Please check our screw specifications page to see the wide range of options we can supply or contact us now with your detailed requirements.
Choose based on the product’s intended use, application method, and customer requirements.
Commonly used types include SUS302, SUS304, SUS316, SUS410. A special type called NSSC550 is exclusive to Cheng Hao, which has high hardness, high corrosion resistance, and high acid resistance. Its rust prevention is 15 times better than existing materials for screws.
Low carbon steel, medium carbon steel, high carbon steel.
Refers to steel materials that, besides containing carbon, also have other alloying elements such as silicon, manganese, chromium, nickel, vanadium, molybdenum, etc.
Common material codes include 2011, 2024, 6061, 6082, 7075.
Brass (Yellow brass), Bronze.
Choose based on the product’s intended use, application method, and customer requirements.
Please view our commonly ordered screw types below or let us know your special requirements for custom screws.
These are some of the most frequently asked questions by our customers. We hope they are helpful to you. If you cannot find the answer you need, please contact us using the inquiry button below.
To quote accurately, we need to know the substrate material and thickness, the required drill point number, head type, drive type, coating or corrosion resistance requirements, target market, and any packaging or documentation requirements.
If you are matching an existing product or replacing a current supplier, a sample or a complete dimensional drawing is the most efficient starting point.
The drill point number indicates the maximum steel thickness the screw can penetrate without a pilot hole. Point #1 is designed for thin sheet metal up to approximately 0.8mm, while #3 handles steel up to around 4mm and #5 is for structural steel up to approximately 12.5mm. Timber and composite substrates have their own recommendations based on density.
When you send us your inquiry, confirm the substrate material and thickness so we can verify the correct point specification for your product range.
We supply hex washer head as the most common configuration for construction and roofing, along with pan head and wafer head for applications where a lower profile is needed. Drive types include Phillips, square drive, and combination head depending on your market preference.
If you need a specific head and drive combination that is not listed, let us know and we will confirm whether it can be accommodated within your order volume.
Standard production is in carbon steel with zinc electroplating for general construction applications. Stainless steel grades 304 and 316 are available for corrosion-resistant applications, and we also supply NSSC 550 duplex stainless steel for high-demand environments where standard stainless is not sufficient.
Additional coating options include yellow zinc, Ruspert silver, black oxide, and powder coating. The right choice depends on the end environment, expected service life, and any applicable corrosion performance standards in your target market.
Yes. We can supply screws capable of penetrating up to 5mm stainless steel plate or 13mm mild steel plate depending on the point specification and material used.
If your application involves steel at the upper end of these ranges, please confirm the exact substrate thickness and material grade when inquiring so we can recommend the appropriate point number and shank hardness.
Standard inspections include dimensional checks, drill point geometry verification, hardness testing of the shank and drill tip, drive recess inspection, and coating adhesion checks. Salt spray testing is available for orders where corrosion performance certification is required.
We can provide inspection reports with each shipment. If you have a specific test plan, inspection method, or documentation format required for your market, please confirm this before production begins.
Yes. We produce OEM and private label self-drilling screws for distributors supplying construction, roofing, and steel framing markets. You can specify the drill point number, thread form, head type, drive type, coating, and packaging format, and we will produce to your approved sample.
We supply a pre-production sample for approval before mass production begins. Contact us with your product specification or an existing product reference if you want us to match a current item.
Self-drilling screws have a hardened drill point that cuts through the substrate and forms the thread in a single step, with no pilot hole required. Self-tapping screws require a pre-drilled hole and form threads in that hole as they are driven. The right choice depends on the substrate material, thickness, and the installation process used in your target market.
When placing an order, confirming this distinction matters because it affects point geometry, shank hardness, thread form, and overall screw design. If you are unsure which type is correct for your application, share the substrate and installation method and we can advise.
We support bulk carton packaging for wholesale supply, as well as small retail boxes, private label printed packaging, blister packs, and mixed assortment packing programs.
If you need packaging that matches your existing product range, including specific box dimensions, artwork, barcode labels, or multilingual labelling for different markets, let us know the details when you inquire and we will confirm what can be accommodated.
