EJOT Screws and Compatible Options | Hebei Wotu Fastener Manufacturing Co., Ltd.
EJOT screws are usually specified for a particular building or assembly application, not selected by diameter and length alone. The key decision is whether you need an original EJOT fastener for a defined system or a compatible screw that matches the same substrate, head form, drive, thread engagement and installation method.
For roofing, facade, insulation, panel or general fastening work, the correct combination of screw geometry and corrosion protection affects holding power, installation time and the finished surface. Start with the material being fixed, the supporting substrate and the required fixing depth.
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 MoreSpecification points to compare
When comparing an EJOT screw or a compatible option, review the application, substrate, screw diameter and length, thread and point style, head and drive, washer or sealing arrangement, material, finish and installation method. The right choice depends on the complete joint specification rather than the brand name or a single dimensional match.
| Criterion | What To Check | Why It Matters | Buyer Tip |
|---|---|---|---|
| Original EJOT part or equivalent screw type | Match the drawing, part number, head style, thread form, drive recess, length, diameter, and coating against the approved specification. | EJOT is often used as a brand-specific reference. A visually similar self-tapping or self-drilling screw may not give the same clamp load, hole forming behavior, or assembly result. | Do you need an original EJOT part, or is a technically equivalent screw acceptable if it matches the drawing and test requirements? |
| Substrate and hole condition | Confirm the materials being joined, sheet thickness or panel thickness, and whether the hole is pre-drilled, punched, molded, or formed by the screw. | Thread-forming, self-tapping, and self-drilling screws behave differently. The wrong point or thread can strip plastic, enlarge metal holes, or leave poor engagement. | What materials and hole preparation will the screw see in the actual assembly? |
| Head, drive, and seating surface | Compare pan, countersunk, flange, washer-head, or other head forms, plus the required drive type and seating face. | The head controls how load spreads, how flush the screw sits, and whether the driver can apply torque without cam-out or damage. | Does the assembly need a flush surface, a bearing washer effect, or clearance for a tool at the installation angle? |
| Corrosion protection and appearance | Specify the coating or finish required by the application, and ask how it affects mating materials, paint systems, and assembly friction. | Finish is not only cosmetic. It can affect corrosion resistance, torque behavior, and compatibility with outdoor, appliance, automotive, or enclosure use. | What service environment and appearance standard should the screw meet after installation? |
| Assembly torque and thread engagement | Review the pilot hole recommendation, engagement depth, installation torque window, and any pull-out or strip-out testing needed for the joint. | Many screw failures come from a joint design issue rather than screw length alone. Too little engagement loosens; too much torque can strip the thread or crack the material. | Can you share the mating material, hole size, and target tightening process so the screw can be checked against the joint design? |
An original EJOT screw and a compatible alternative are not automatically interchangeable. A visually similar screw may have a different thread profile, washer arrangement, drilling point, head diameter or coating, which can change pull-through resistance, sealing or installation behavior.
The practical distinction matters most in system-based construction. If the screw forms part of an approved assembly or must fit an existing tool and washer, confirm the exact EJOT reference and application requirements first. If the project allows an alternative, compare the full specification rather than matching only the overall length.
Match the screw to the substrate. Metal-to-metal, metal-to-wood, plastic, insulation boards and pre-drilled assemblies place different demands on the thread and point. Confirm the base material, its thickness and whether the screw must create its own hole or enter an existing one. Choosing a self-tapping screw where a self-drilling point is needed can slow installation or damage the joint.
Check the joint geometry. Specify the required length from the total material stack, washer or seal arrangement and intended thread engagement. A longer screw is not automatically stronger; excess penetration can interfere with hidden components, while insufficient engagement can reduce holding power. Head style also matters when the surface must remain flush, carry a washer or resist pull-through.
Choose protection for the exposure. Indoor dry assemblies, sheltered construction and exposed exterior work may require different material or surface-treatment choices. Confirm the expected moisture, pollutants, temperature and contact with dissimilar metals before accepting a coating based only on appearance. For sealing applications, check that the screw, washer and supporting surface are designed to work together.
Verify installation and documentation before volume buying. Ask for the exact screw designation, material and finish, compatible driver or bit, recommended installation method and any system-specific requirements. A small trial in the actual substrate can reveal stripping, over-driving, poor seating or inadequate thread engagement before the project is committed to a large quantity.
| Criteria | Importance | Description | Example Options |
|---|---|---|---|
| Original reference versus compatible alternative | Critical when the screw is part of a specified system | An original EJOT reference may be required by the project specification, while a compatible alternative must be checked against every functional feature rather than appearance alone. | A facade fixing with a named reference should not be replaced simply because another screw has the same length. |
| Substrate and point type | High impact on installation and joint reliability | The screw point must suit the base material and whether the hole is pre-drilled, self-tapped or self-drilled. Metal, wood, plastics and composite panels can need different thread and point designs. | A metal-to-metal assembly may need a different point than a screw used into timber or pre-drilled sheet. |
| Head, drive and washer arrangement | Important for seating, sealing and tool compatibility | Head shape controls how the screw bears on the surface, while the drive affects installation control. Washers or seals must match the surface and application if water resistance or load spreading is required. | A countersunk head may suit a flush furniture or panel application, while a washered head may be needed on a roof sheet. |
| Length and thread engagement | Essential for holding power and avoiding interference | The correct length depends on the full material stack, any washer, and the required engagement in the supporting material. More length is not always better if it penetrates too far or hits hidden components. | A screw passing through insulation and sheet metal must still achieve enough engagement in the base material. |
| Material and surface protection | Important for service environment and appearance | Indoor, sheltered and exposed applications may call for different fastener materials or finishes. The choice should consider moisture, contact with other metals and the expected visual finish. | An exterior panel fixing may need different corrosion protection than a dry indoor assembly. |
Related Options
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Sometimes, but only after comparing the full specification. Check the substrate, thread form, drilling or tapping point, head diameter, washer or seal, coating and installation method. If the screw is part of an approved facade, roofing or insulation system, confirm whether substitution is allowed before buying.
Provide the application, material being fixed, supporting substrate, material thicknesses, required length and diameter, head and drive type, finish or material, and any EJOT reference number if you have one. Photos or drawings of the joint help clarify washer position, head clearance and thread engagement.
No. A self-drilling screw makes its own hole in suitable material, while a self-tapping screw forms or cuts a thread in a prepared or suitable hole. Using the wrong type can slow installation, damage the substrate or leave the joint with poor engagement.
The washer affects sealing, load spread and how the head seats against the surface. A screw with the right length but the wrong washer may still leak, mark the surface or pull through a softer sheet or panel.
Diameter and length are only the starting points. Two screws with the same basic size can differ in thread pitch, point type, head shape, coating and drive recess. Those details can change installation torque, holding power and the finished appearance.
Tell us the application and base material, the required EJOT reference or screw dimensions, and whether you need an original part or a compatible alternative.
