Can you provide material test certificates?

Yes, material certificates can be provided together with shipments to meet project inspection requirements.

Black Phosphated Fine Thread Drywall Screw for Ceiling Installation

Name: Black Phosphated Fine Thread Drywall Screw for Ceiling Installation
Brand: Qewitco Fasteners Co., Ltd
SKU: 2108949002

Shandong, ChinaQewitco Fasteners Co., Ltd

US$0.01-0.30

1,000 Pieces

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Material

Carbon Steel

Type

Drywall Screw

Model NO.

Drywall Screw

Groove

Phillips Recess

Connection

Common Bolt

Head Style

Bugle Head

Standard

DIN, ISO

Grade

Thread Standard

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

Finish

Black Phosphating and Grey Phosphating

Packag Color

Customizable

Custom Order

Customization by Drawing/Sample

ODM/OEM

Available

Service

Custom-Made Service

Material Test Certificate

Have

Delivery

5-15 Days

Sample

Samples in Stock Are Free with Freight Collect

Price Terms

Fob/CFR/CIF/DDP/DAP

Quality Control

100% Quality Inspection

Application2

Connection,Fastening

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

Black phosphated countersunk drywall screw. The tapered countersunk head can sink fully into the board after tightening without protrusion, facilitating subsequent putty finishing.

This drywall screw with black phosphated finish has a lubricated surface, reducing driving resistance and lowering torque during installation.

Fine thread design of drywall screw fits for connection between drywall and light steel keel, providing stable clamping force and preventing loosening.

Available in two surface finishes: black phosphating and grey phosphating for customers to select based on project conditions.

Self-tapping sharp point eliminates pre-drilling; the screw can be driven directly into drywall to improve on-site installation efficiency.

Full range of sizes. We supply black phosphated countersunk drywall screws in various lengths to match drywall boards of different thickness.

OEM and ODM Services: Full customization support available based on customer drawings or physical samples.

Free of charge samples are offered for your quality inspection, buyers only need to bear the courier freight.

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: ≤0.47hTerms 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 surface treatments are available for this drywall screw?

The countersunk drywall screw has two options: black phosphating and grey phosphating. The phosphate coating comes with natural lubrication.

Q:How about the anti-rust performance of black phosphated drywall screws?

Phosphating offers basic rust protection for dry indoor applications. Galvanized fasteners are recommended for humid environments.

Q:What are the main applications of black phosphated countersunk drywall screws?

Mainly used for indoor partition and ceiling assembly between drywall and light steel keel, widely applied in interior decoration projects.

Q:Can you customize the length of drywall screws?

Standard sizes are in stock. Non-standard lengths can be produced according to customer drawings or samples.

Q:What is the difference between countersunk head and round head drywall screws?

The countersunk head sinks into drywall for a flat surface ready for putty filling, while round heads protrude and are not suitable for wall finishing.