What's the delivery time?

We have most sizes in stock. For orders under 5,000 pcs, the lead time is 5-7 days.

Do you factory have the capacity to help customer design develop new items?

Yes, Qewitco has its own product research & development department. With agreement, based on sample or spec. drawings, Qewitco would like to develop new items for special application.

How is the payment terms?

For new customers, 30% / 50% in advance and 70% At Sight of Copy of B/L. With mutual learning / confidence, we accept to discuss new payment term.

How can you get a quote quickly?

Please email us with all the information you have, and if there are any details missing, feel free to send us pictures of the product or packaging so we can accurately determine your needs.

Countersunk Head Drilling Screw for Sheet Metal with Galvanized Black Oxide Ss

Name: Countersunk Head Drilling Screw for Sheet Metal with Galvanized Black Oxide Ss
Brand: Qewitco Fasteners Co., Ltd
SKU: 2108223362

Shandong, ChinaQewitco Fasteners Co., Ltd

US$0.01-0.10

1,000 Pieces

Sample price:US$20.00/piece.Request sample

Product profile

Customization

Available

Material

Carbon Steel,Stainless Steel

Type

Drilling Screw-Countersunk Head

Model NO.

Self-Drilling Screws for Construction Project

Groove

Phillips Recess

Connection

Common Bolt

Head Style

Flat Head

Standard

DIN, ISO

Grade

8.8,10.9,12.9

Delivery

7-15 Days

Certification

DIN 7504p

Packag Color

Customizable

Thread Standard

Unc/Unf/Unef/Uns/Bsw/Bsf/Metric Coarse/Metric Fine

Custom Order

Customization by Drawing/Sample

ODM/OEM

Available

Service

Custom-Made Service

Material Test Certificate

Have

Sample

Samples in Stock Are Free with Freight Collect

Price Terms

Fob/CFR/CIF/DDP/DAP

Color

Customizable or Sliver

Quality Control

100% Quality Inspection

Application2

Connection,Fastening

Finish

Phosphate, Zinc Plated(De-Embrittlement)

Transport Package

Bulk Pack Small Boxed

Specification

DIA 3.5MM TO 6.3MM LENGTH 9.5MM TO 250MM

Trademark

Qewitco

Origin

China

HS Code

731816

Production Capacity

10000ton/Year

Key features

With a cross-recessed design, the screw sits flush with the surface after installation, leaving no protrusions and creating a smooth, attractive finish.

Cross-slot drive ensures even force distribution, making it less likely for the power tool to slip during operation and reducing the risk of scratching the slot.

Self-drilling and self-tapping-no need for pre-drilling; drilling, tapping, and fastening are all completed in one step, improving construction efficiency.

Galvanized/stainless steel finish, rust- and corrosion-resistant, suitable for standard indoor and outdoor environments

The drill bit is hardened through quenching, providing strong penetration capabilities and enabling it to drill directly into thin steel plates and light-gauge steel sections.

The precision-rolled threads feature a uniform profile, tight engagement, and resistance to vibration and loosening, making them less likely to come loose.

Available in a wide range of lengths to accommodate different panel thicknesses and various installation conditions

Complies with industry standards and specifications; highly versatile and compatible with standard electric screwdrivers available on the market.

The factory is certified under the ISO 9001 quality management system, ensuring consistent batch quality and reliable delivery times for bulk orders.

We support bulk wholesale orders and can customize special lengths, surface finishes, and packaging solutions.

Company profile

Years of Export ExperienceExperienced TeamSelf-brandedHigh Repeat Buyers Choice

Qewitco Fasteners Co., Ltd

Shandong, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc.Export Year: 2003-12-05Average Response Time: ≤1.17hTerms of Payment: T/T

AI-Powered supplier vetting

SummaryThe supplier demonstrates established export experience, with 90% of sales from exports and 22 years of exporting. It has ISO9001:2015 certification, raw-material traceability, quality assurance, and 100% finished-product inspection, although inspection is performed by packing staff and only two quality inspectors are reported. Customization is broad, covering samples, designs, full customization, minor customization, and flexible customization. Service strengths include in-stock capability, stated lead times within 15 workdays in both peak and off-season, and multiple payment and quotation terms. Limitations include no overseas warehouse, showroom, agent, branch, or overseas service-country coverage, no Fortune 500 cooperation, no new products launched in the last year, one R&D engineer, no popular-brand OEM, and an undocumented corrective/preventive-action process. Financial credibility cannot be assessed because the provided financial figures are excluded from evaluation.

Supplier typeThe supplier is strongly export-oriented, reporting 90% export sales and 22 years of export experience. It can provide in-stock service and accepts FOB, CIF, CFR, and EXW terms, but reports no overseas warehouse, showroom, agent, branch, or overseas service-country coverage.

CertificationsThe supplier reports an ISO9001:2015 certificate for both sustainable development management and management systems, plus other product compliance or sustainability certifications. The specific additional certifications are not identified, so the evidence supports ISO9001 holding but not broader certification strength.

R&D capabilityThe supplier reports one R&D engineer and no new products launched during the previous year. It also reports no available SDK and no popular-brand OEM capability, which indicates limited documented innovation evidence.

Production capacityProduction-related evidence includes raw-material traceability, 100% finished-product inspection, quality assurance, four own-brand quality-control capabilities, inventory capacity, and lead times within 15 workdays in both peak and off-season. Only two quality inspectors are reported, and finished products are checked by packing staff, so production capability is positive but quality-control depth is limited.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, minor customization, and flexible customization. This is direct evidence of broad customization capability.

Product Q&A

Q:What materials can this countersunk self-drilling screw fasten?

Mainly for thin steel sheet, light steel keel, metal-wood composite boards. Ideal for applications requiring flat finished surface.

Q:What is the maximum steel thickness it can drill?

Suitable for thin steel plate within 4.2mm. For thicker steel, please select self-drilling screws with larger drill-point.

Q:What is your MOQ?

Stock sizes accept small trial orders. Custom-made items require higher MOQ, please contact us for details.

Q:How does your factory do regarding quality control?

Clear standards and written inspection records, including incoming material, each process control, final inspection, and customer's complaint. Daily record is traceable.

Q:Do you have quality certification?

Yes, CE, SGS, ISO, etc.