Screws for Buyers in India | Hebei Wotu Fastener Manufacturing Co., Ltd.
For buyers in India, the main screw decision is not only size. The application decides the thread type, head style, point, coating, and installation method. A screw that works in furniture board may fail in sheet metal, roofing, or outdoor fastening even if the length looks close.
Start with the joint: what materials are being fastened, whether the hole is pre-drilled, how much clamping is needed, and what exposure the screw will face after installation.
Brand: Wotu Surface: blue and white zinc plated Specifications: Chinese national standard 6#/8#/10#/12#/16#/20#, rod length 35mm~250mm full range of specifications in stock, supports nonstandard length customization Packaging: 25kg cartons, full pallets packed on wooden pallets, support neutral packaging, private-label customization
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Brand: Wotu Standard basis: German standard DIN934-1987, metric coarse thread/fine thread universal thread Surface: 304 stainless steel Specifications: M6～M24 full range of specifications Supporting equipment: same specification bolts, flat washer, spring washer complete set of shipment Packaging: 25kg standard carton, whole wooden pallet packaging
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Brand: Hengzuan Surface: blue and white zinc plated Specifications: in stock ST4.2/ST4.8full range of specifications, length 13~50mm in stock, support nonstandard length customization Packaging: 25kg cartons, solid wood packaging, support neutral packaging, private-label customization
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Brand: Hengzuan Surface: Color zinc plated, optional blue-white zinc plated, black oxide treatment Specifications: Chinese national standard ST4.2/ST4.8/ST5.5 specifications, rod length 13~50mm in stock, supports nonstandard length customization Packaging: 25kg export cartons, full wooden pallets wrapped with film, supports neutral packaging, private-label customization
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Brand: Hengzuan Surface: blue and white zinc plated, can be customized color zinc plated, black oxide plated Specifications: Comply with GB/T15856.2-2002 Chinese national standard, in stock ST4.2/ST4.8/ST5.5 full range of specifications, length 13mm~75mm optional, supports customized nonstandard rod lengths; drilling adaptation plate thickness 0.7~6mm Packaging: 25kg export cartons, full pallets wrapped with film, supports neutral export packaging, customer private-label customization
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Brand: Hengzuan Surface: blue and white zinc plated, can be customized color zinc plated, black oxide plated Specifications: in stock 3.5/3.9/4.2/4.8/5.5 mainstream wire diameter, rod length 13mm~75mm full size range, nonstandard length can be customized as needed Packaging: 25kg export cartons, full wooden pallets wrapped with film, supports neutral export packaging, private-label customization
Read MoreScrew selection criteria
Useful screw selection compares thread type, point design, head style, drive recess, material, finish, and packing format against the real assembly. The right choice depends on how the screw is installed and what failure would cost in the finished product.
| Criterion | What To Check | Why It Matters | Buyer Tip |
|---|---|---|---|
| Screw type for the base material | Match the screw to the material being fastened, such as sheet metal, timber, roofing sheet, fiberboard, or pre-drilled parts. | Self-drilling, self-tapping, wood, and fiberboard screws cut or hold differently. The wrong type can strip, split the material, or slow installation. | Ask: What material will the screw enter first, what material will it hold, and will the hole be drilled before assembly? |
| Thread form and engagement | Compare thread pitch, thread depth, point style, and the length of thread that will sit inside the receiving material. | Thread engagement controls pull-out resistance and installation feel. Too little engagement weakens the joint; too much can damage thin material. | Ask for a screw recommendation based on total clamping thickness and the thickness of the material that provides the holding strength. |
| Head style and drive recess | Confirm whether the job needs countersunk, pan, hex washer, wafer, or another head, and choose a drive that matches the installation tool. | The head affects flush finish, bearing area, torque transfer, and appearance. A poor drive match increases cam-out and damaged heads. | Ask: Should the head sit flush, clamp over a washer, or remain visible, and what driver bit will the installer use in India? |
| Coating and site exposure | State the installation environment, including indoor dry use, humid storage, exterior exposure, roofing, or contact with treated wood or metal panels. | Coating choice affects corrosion resistance, appearance, and compatibility with adjoining materials. A decorative finish may not suit exposed outdoor work. | Ask what coating options are available for the intended environment and whether samples can be checked before bulk purchase. |
| Packing, labeling, and import-ready details for India | Confirm carton quantity, bag or bulk packing, size markings, product description, and documents needed by your purchasing or logistics team. | Clear packing and labeling reduce receiving errors, mixed sizes, and delays during warehouse handling or project distribution. | Ask for the exact packing method, carton markings, and document list before confirming an order for delivery to India. |
The practical distinction many buyers need to make is between self-tapping, self-drilling, wood, fiberboard, and roofing screws. Self-tapping screws form threads in a prepared or suitable hole, while self-drilling screws include a drill point for many metal applications. Fiberboard screws use coarse threads for engineered wood, and roofing screws need the correct washer and sealing contact, not just the correct length.
This matters because the wrong point or thread can slow assembly, strip the material, crack board, leave loose joints, or create leak paths. If the project involves mixed materials, such as metal-to-wood or metal-to-metal fastening, confirm the base material thickness, the driven material, and whether installers will drill pilot holes.
Match the screw to the material first. For furniture and cabinet work, thread grip in particleboard, MDF, or plywood usually matters more than high drilling speed. For metal sheet assemblies, point design and thread formation become more important. For roof panels, the washer, sealing surface, and correct seating pressure are part of the fastener choice.
Do not treat length as the only specification. A longer screw may still give poor holding if the thread form is wrong or if the head does not seat correctly. Head style affects flush finish, torque transfer, and contact area. Countersunk heads suit flush furniture assembly; hex washer heads are common where driving speed and clamping area matter.
Choose coating with the service environment in mind. Indoor dry use, humid storage, exterior exposure, and contact with treated materials can require different finishes. Confirm the finish, color requirement, corrosion expectation, and compatibility with the mating material instead of assuming one plated screw fits every project.
For an enquiry, send the application before asking only for a size. Share the material combination, screw diameter and length if known, head and drive preference, point type, finish, packing needs, and target use in India. If the specification is still open, ask which screw type fits the assembly and what details are needed to confirm it.
| Criteria | Importance | Description | Example Options |
|---|---|---|---|
| Base material and joint type | Usually the first decision factor | The screw must match the material it bites into and the material it clamps. Wood board, sheet metal, roofing panel, and mixed-material joints often need different thread and point designs. | A cabinet joint in MDF may need a coarse-thread countersunk screw, while a thin metal bracket may need a self-tapping or self-drilling style. |
| Point design | Important for installation speed and hole preparation | The point affects whether the screw needs a pilot hole, can form threads, or can drill into a suitable metal sheet. Choosing the wrong point can increase tool wear, slow assembly, or damage the workpiece. | A self-drilling point may suit some metal-to-metal fastening, while a self-tapping screw may be used where the hole is already prepared. |
| Head and drive style | Important for seating, appearance, and torque transfer | The head controls how the screw sits against the surface, and the drive affects installation control. A flush surface, broad clamping area, or fast power-tool driving may each call for a different design. | A countersunk head can sit flush in furniture, while a hex washer head is often considered where quick driving and wider bearing contact are useful. |
| Finish and service environment | Important where corrosion, moisture, or appearance matters | Indoor dry assemblies, humid storage, and outdoor exposure do not place the same demands on a screw finish. Buyers should confirm the expected environment and any appearance requirement before selecting a coating. | An indoor furniture screw and an outdoor roofing screw should not be assumed to use the same finish or washer arrangement. |
| Packing and installation method | Practical for project procurement and site use | Packing format, labeling, and compatibility with the installer’s tools can affect handling and assembly efficiency. These details are separate from the screw size but can still affect the purchasing decision. | A workshop using power drivers may care about drive consistency and carton identification, while a small maintenance order may prioritize easy quantity checking. |
Related Options
For furniture assembly, a countersunk fiberboard screw may be the better fit; for sheet metal work, self-tapping or self-drilling options may be more relevant; for roofing, washer performance and seating are critical. The best match is the screw that supports the actual joint, tool method, and service environment.
Fiberboard screws are selected based on more than screw size alone. For furniture assembly and board-based applications, buyers need to match the screw structure with the characteristics of fiberboard, MDF, and similar engineered wood materials. A suitable specification should consider thread design, head style, screw length, diameter, installation method, and application requirements. For buyers sourcing […]
#4 self tapping screws should not be purchased from the “#4” designation alone. For a usable B2B specification, the buyer still needs the actual screw diameter, thread form or pitch, overall length, substrate, pilot-hole condition, head and drive style, material, surface finish and quantity. This matters because suppliers may use different naming systems. Wotu Fastener’s […]
A request for “1 1/2 self tapping screws” is incomplete until the buyer confirms what the 1 1/2 dimension refers to and how the screw will engage the base material. If 1 1/2 inch is the required overall length, that is only one part of the specification. Diameter, thread, head, drive, substrate, pilot-hole condition and […]
Direct answer: Choose a self-drilling screw when the fastener must create a hole through a verified metal stack before its threads engage. Choose a self-tapping screw when the assembly already has a correctly sized pilot hole or when the selected thread is intended to form or cut into the specified substrate. The decision must also […]
Direct answer: Correct screw length does not guarantee a watertight metal-roof connection. Self tapping roofing screws can leak because of incorrect washer compression, enlarged or stripped holes, insufficient thread engagement, panel movement, or an unsuitable coating-and-washer system. Buyers should diagnose the complete installed connection—including panel profile, support thickness, point type, washer condition, and exposure—rather than […]
Direct Answer: A self-drilling screw has a drill-shaped point that creates a hole and then forms mating threads in a suitable material. A self-tapping screw forms or cuts mating threads but may require a correctly sized pilot hole. Selection depends on substrate type and thickness, joint stack, point geometry, installation tool, finish and application testing—not […]
For particleboard, MDF, and similar furniture panels, coarse-thread fiberboard screws are often more suitable than general metal screws because they are designed to grip engineered wood. Confirm the board type, screw length, head style, and whether a flush countersunk finish is required.
Self-tapping screws form threads in a prepared or suitable hole, while self-drilling screws have a drill point that can reduce or remove a separate drilling step in many sheet metal assemblies. The better choice depends on metal thickness, access, tool speed, and whether the installer can control hole preparation.
No. Length matters, but thread form, point style, head type, drive recess, coating, and material engagement can change the result. A screw with the right length can still strip, crack the material, sit poorly, or fail to seal if the rest of the specification is wrong.
Leaks can come from poor washer seating, incorrect screw angle, over-driving, under-driving, panel movement, or a washer that does not match the roofing surface. For roofing use, buyers should confirm washer type, head style, drilling method, and the panel materials rather than checking length alone.
Share the application, materials being fastened, approximate screw diameter and length, head and drive preference, point type, finish, and packing requirement. If you do not have a fixed drawing, describe the joint and installation method so the screw type can be discussed before pricing.
Send the material being fastened, preferred screw size or drawing, and the required head, drive, point, finish, and packing details. If the specification is not fixed, describe the application and installation method.
