Standard Screws Industries Selection Guide | Hebei Wotu Fastener Manufacturing Co., Ltd.
Standard screws support repeatable assembly across furniture, construction, sheet-metal work, equipment manufacturing and general maintenance. The main decision is not simply the screw length; it is the match between the screw’s thread, head, material, finish and the materials being joined.
A screw described as “standard” may refer to a commonly used size, head form or industry standard rather than a universal part. Selecting the correct type can improve fit, installation consistency and serviceability without adding unnecessary cost or assembly steps.
Brand: Wotu Surface: 304 stainless steel Specifications: in stock M6~M24 full standard metric specifications, supports nonstandard pitch, thickening/customized Matching: Can be matched with bolts of corresponding specifications, flat washer, spring washer complete set of supporting shipment Packaging: 25kg cartons, whole wooden pallets
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Brand: Wotu Surface: color zinc plated, blue-white zinc plated, black oxide, hot-dip galvanized, various surface treatments available Specifications: Comply with DIN934, GB/T6170, GB/T6172.1, GB/T6177.1 standards, in stock M6-M64 full range of specifications, support nonstandard customized Packaging: woven bag inside/25kg export carton, full-container wooden pallet wrapped with film, supports private-label, neutral export packaging
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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: 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: Wotu Surface: zinc plated Specifications: in stockM6/M8/M10/M12/M14/M16/M20 Chinese national standardfull range of specifications, support nonstandard thickness, tooth pitch customized Matching: can be matched with bolts of the same specification, flat washer, spring washer complete set of shipment Packaging: 25kg cartons, whole wooden pallets
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Brand: Hengzuan Surface: blue and white zinc plated Specifications: in stock ST2.9/ST3.5/ST4.2/ST4.8/ST5.5 Chinese national standard full series, complete rod length 13~60mm, supports nonstandard length customization; drilling adapts to steel sheet thickness 2~6mm Packaging: 25kg cartons, whole wooden pallets
Read MoreScrew selection criteria
When comparing standard screws, review the joint materials, thread form, nominal size, length, head style, drive type, material, surface finish and applicable standard together. The most suitable option is the one that installs reliably in the intended process and provides the required fit and environmental resistance, not necessarily the lowest-cost or most familiar screw.
| Criterion | What To Check | Why It Matters | Buyer Tip |
|---|---|---|---|
| Applicable screw standard | Match the drawing or purchase spec to the required standard for head style, thread form, point type, drive, length and tolerance. | A screw can look correct but fail assembly if the thread, head height or point does not match the mating material or tool setup. | Which standard or drawing controls this order, and are substitutions allowed only with written approval? |
| Material and strength class | Confirm the base material and any stated mechanical grade against the load, vibration and installation method in the application. | Under-specified screws may strip, shear or loosen; over-specified screws can add cost or create compatibility issues with softer mating parts. | What material will the screw fasten into, and is the joint carrying load, clamping sheet, or only positioning parts? |
| Surface treatment and corrosion exposure | Review the finish or coating required for indoor, outdoor, humid, chemical or treated-wood environments. | The same screw geometry can perform very differently after plating or coating changes, especially in corrosion resistance and driver fit. | Where will the assembled product be used, and is there a required coating, salt-spray target or finish appearance to match? |
| Head, drive and installation access | Compare pan, countersunk, hex washer or other head types with the available tool, clearance and finished surface requirement. | A poor head or drive choice slows assembly, damages surfaces, or prevents the screw from seating correctly. | Will operators install these screws manually, with power tools, or on an automated line? |
| Thread and point for the mating material | Select self-tapping, self-drilling, machine or wood-style threads based on whether the hole is pre-drilled and what material is being fastened. | Thread pitch and point design affect starting speed, pull-out resistance, chip formation and risk of cracking or stripping. | What is the mating material thickness, and will the screw form its own thread or enter a prepared hole? |
The practical distinction is between a standard machine screw, a self-tapping screw and a self-drilling screw. Machine screws normally work with a prepared threaded hole or nut, while self-tapping screws form or cut a thread in the receiving material. Self-drilling screws add a drilling point, which can reduce separate drilling work when joining suitable sheet materials.
That difference matters because the wrong thread or point can damage the substrate, fail to clamp the joint properly or create avoidable installation time. Choose from the joint design and material combination first, then confirm the required head, drive, size and finish.
Match the screw to the materials. Wood, fiberboard, thin sheet metal, plastic and pre-threaded metal holes each require different thread behavior. Coarse threads can suit some softer materials, while finer threads may be more appropriate for certain metal assemblies. Do not substitute a general-purpose screw simply because its length appears correct.
Specify the joint geometry. A countersunk head is useful when the head must sit flush, while a pan, hexagon or other projecting head may provide a different clamping or driving arrangement. Check the available clearance, the driver or tool used on the assembly line, and whether a washer or nut is part of the joint.
Consider the environment and finish. Moisture, outdoor exposure, chemicals, heat and contact with dissimilar metals can affect the suitable material or surface treatment. A bright finish should not be treated as proof of corrosion suitability. Ask for the available material and coating options and confirm that they fit the service environment.
Prepare a clear enquiry. Send the materials being joined, the application, the required screw size and thread, the head and drive style, any applicable standard, and the expected quantity. Ask Hebei Wotu Fastener Manufacturing Co., Ltd. to confirm which details it can supply, what tolerances or inspection information are available, and whether samples are appropriate before a larger order.
| Criteria | Importance | Description | Example Options |
|---|---|---|---|
| Screw function | High impact on installation method | Machine screws, self-tapping screws and self-drilling screws serve different joint designs. Selecting by name alone can lead to extra drilling, poor thread engagement or unsuitable fastening. | A pre-threaded metal part may call for a machine screw, while thin sheet metal may lead the buyer to compare self-tapping and self-drilling options. |
| Thread and receiving material | Critical for joint reliability | The thread must suit the material being fastened into, such as wood, fiberboard, plastic, sheet metal or a tapped hole. Too aggressive or too fine a thread can reduce holding performance or damage the part. | A furniture panel and a metal bracket may require different thread forms even if the visible screw length is similar. |
| Head and drive style | Important for assembly speed, clearance and appearance | Head style affects whether the screw sits flush or projects above the surface. Drive style affects tool compatibility, torque control and assembly consistency. | A countersunk cross-drive screw may suit a flush furniture surface, while a hex head may be easier to drive in some sheet-metal assemblies. |
| Material and surface finish | Important for service environment | Base material and coating should be matched to moisture, chemicals, temperature and contact with other metals. A shiny appearance does not by itself confirm corrosion suitability. | An indoor cabinet assembly may have different finish requirements from a fastener used on equipment exposed to humidity. |
| Standard, drawing or sample control | Useful when repeatability matters | An applicable standard, drawing or approved sample helps keep dimensions, head form, thread and finish consistent across repeat purchases. Without this, similar-looking screws may still differ in important ways. | For a production assembly, buyers commonly confirm the required standard or provide a drawing before approving a bulk order. |
Related Options
For a furniture assembly, sheet-metal enclosure or equipment build, the priority may shift between flush seating, thread engagement, drilling ability and resistance to the working environment. Compare candidate screw types against the actual joint and installation tool, then confirm sample fit before committing to a repeat order.
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Not always. A screw used in furniture assembly may have the right length but the wrong thread, head shape or finish for metal equipment, outdoor work or plastic parts. Treat “standard” as a starting description, then verify the joint material, installation method and applicable standard for the actual application.
Countersunk screws sit flush when the receiving material is properly prepared, which is useful for furniture panels, covers and surfaces that need a clean finish. Projecting heads such as pan or hex heads can provide easier driving access or different clamping behavior, but they remain above the surface. The choice depends on clearance, appearance, tooling and whether the material can accept a countersink.
A surface finish can improve corrosion resistance, but suitability depends on the coating type, base material, exposure level and contact with other metals. Outdoor, humid or chemical environments need more careful confirmation than indoor dry assemblies. Ask what material and finish options are available and whether they match the intended service conditions.
Provide the screw type if known, size, length, head and drive style, thread requirement, material or finish, applicable standard, quantity and the materials being fastened. If the design is not fixed, share the application and installation method so the supplier can review a suitable option. A drawing, sample or photo can reduce misunderstanding, especially for replacement parts.
Tell us the materials being joined, the application or industry, and the required screw size, head, finish, standard and estimated quantity so the enquiry can be reviewed accurately.
