Self-Tapping Screw Size Chart for RFQ Preparation | Hebei Wotu Fastener Manufacturing Co., Ltd.
Use this page to evaluate Self-Tapping Screw Size Chart from the perspective of export order preparation. It brings together related products, practical selection checks, and buyer questions so your inquiry can be more specific from the beginning.
For a factory purchasing team, the most useful starting point is installation, usage, and after-sales questions. Review the product matches, comparison notes, FAQs, and recent buyer-style feedback before sending final requirements.
Brand: Hengzuan Surface: blue and white zinc plated, optional color zinc plated, black oxide treatment Specifications: in stock ST2.9/ST3.5/ST4.2/ST4.8/ST5.5/ST6.3 full range of specifications, rod length 13mm～80mm, supports nonstandard length customization 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
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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 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: blue and white zinc plated, optional color zinc plated, black oxide treatment Specifications: Follow GB/T846-1985 Chinese national standard, in stock ST4.2/ST4.8/ST5.5 full range of specifications Packaging: 25kg export cartons, full pallets wrapped with film, supports neutral export packaging, private-label customization
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Brand: Hengzuan Surface: high temperature black phosphated anti-rust treatment, blue zinc, color zinc plated coating can be replaced as needed Specifications: in stock ST3.5/ST4.2/ST4.8 common specifications, rod length 16mm~50mm, complete, supports nonstandard size customization, suitable for drilling steel sheets 2~5mm Packaging: 25kg cartons, whole wooden pallets, support neutral packaging, private-label customization
Read MoreRFQ preparation
The related product list helps you compare Self-Tapping Screw Size Chart by actual product direction rather than keyword wording alone. Check whether each product supports export order preparation, then use the table below to prepare a clearer RFQ.
| Criterion | What To Check | Why It Matters | Buyer Tip |
|---|---|---|---|
| Screw diameter | Match chart size to pilot hole | Affects thread forming and fit | Share material grade in RFQ |
| Length selection | Confirm grip and embed depth | Prevents weak fastening | List panel thickness clearly |
| Head type | Pan, countersunk, hex, wafer | Matches tool and surface needs | Attach drawing or photo |
| Point style | Type AB, B, drilling point | Fits sheet or base material | State steel, aluminum, or plastic |
| Finish request | Zinc, black, or custom coating | Supports corrosion and appearance needs | Ask sample before bulk order |
A Self-Tapping Screw Size Chart is used to compare screw diameter, length, thread style, head type, drive type, material, and surface finish against the installation requirement.
For sourcing, the chart should not be used alone. Share the application, base material, target quantity, packaging needs, destination, and sample confirmation requirements so the supplier can check whether the selected size is suitable.
Start RFQ preparation by defining where the self-tapping screws will be installed. Include the base material, hole condition, assembly method, load expectation, and whether the screws are for indoor, outdoor, or special-use environments.
Compare related products by size range, head style, drive type, thread form, material, finish, and packaging. If your team is unsure between similar fasteners, ask the supplier to explain the practical difference for your application rather than only sending a general catalog.
Before confirming samples, prepare drawings, photos, current screw references, or target specifications from your assembly team. Ask how sample size, sample marking, inspection points, and feedback handling will be managed before bulk quotation.
For export order planning, also confirm carton requirements, labeling, documentation needs, delivery schedule, and after-sales communication. Clear technical and usage questions at the beginning can reduce repeated clarification during order review.
| Criteria | Importance | Description | Example Options |
|---|---|---|---|
| Diameter and length | High | Core sizing for fit and strength | ST4.2 x 16 mm |
| Head and drive | High | Affects tool match and clearance | Pan head, Phillips |
| Point type | Medium | Controls tapping start and penetration | Type AB point |
| Material and coating | High | Relates to environment and durability | Carbon steel, zinc plated |
| Application substrate | High | Matches screw to working material | Thin sheet metal |
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Top product matches should be reviewed by fit, specification clarity, customization readiness, and how well they support RFQ preparation. Use these factors to shortlist practical options before contacting the supplier.
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Recent buyer-style notes can help you frame practical comparison questions around export order preparation.
I used the self tapping screw size chart to align pilot hole notes with screw diameters before sending a clearer sourcing request to our maintenance supplier.
I needed a quick way to compare self tapping screw thread sizes, and this page helped me frame my questions around actual application fit.
I checked the self tapping screw size chart before drafting an RFQ, so my team could specify diameter, length, and material expectations more consistently.
I found the self tapping screw size chart helpful when matching screw sizes to sheet metal thickness and avoiding vague notes in our internal purchase request.
Use the chart to define diameter, length, thread type, head style, drive, and material before sending an RFQ. This reduces unclear specifications and helps suppliers match screws to the intended assembly and export order requirements.
For samples, confirm nominal size, thread pitch, overall length, head diameter, point type, coating, and material grade. These details help the factory test fit, drilling behavior, holding strength, and compatibility with the target substrate.
The chart helps compare self-tapping screws with self-drilling screws, machine screws, and wood screws by showing thread form, point design, and size range. Buyers can shortlist the correct product based on installation method and material.
Check base material thickness, pilot hole recommendation, screw diameter, thread engagement length, head clearance, and torque conditions. These factors affect installation stability and reduce the risk of stripping, cracking, or insufficient fastening strength.
Quality checks can compare actual samples against charted dimensions, including diameter, length, head size, thread shape, and point consistency. Visual inspection and dimensional measurement help confirm whether supplied parts match the agreed purchase specification.
Buyers should ask how dimensional discrepancies, coating concerns, mixed sizes, or application feedback will be handled after receipt. Clear communication on inspection records and corrective discussion supports smoother follow-up for export order applications.
Tell us your self tapping screw size chart requirements, quantity, destination, and expected application. Include details related to installation, usage, and after-sales questions for a more useful reply.
