What certifications do these drywall screws hold?

The products are certified with ISO, GS, RoHS, and CE standards.

What surface treatments are available for these screws?

Available treatments include Black phosphated, grey phosphated, galvanized, HDG, Zinc, Yellow Zinc, and Painted.

What is the warranty or quality guarantee for these products?

We guarantee quality by using standard good materials and controlling it seriously through our professional testing department and equipment.

Stainless Steel 304 Bugle Head Drywall Screw M3.5×25 Fine Thread Phillips

Name: Stainless Steel 304 Bugle Head Drywall Screw M3.5×25 Fine Thread Phillips
Brand: QINGDAO ZONGYU INDUSTRY AND TRADE CO., LTD.
SKU: 2157108502

Shandong, ChinaQINGDAO ZONGYU INDUSTRY AND TRADE CO., LTD.

US$800.00-1,000.00

3 Tons

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

Material

Carbon Steel

Shape of Head

Round

Model NO.

2026050802

Surface Finishing

Zinc Plated

Certification

ISO, GS, RoHS, CE

Customized

Thread

Fine or Coarse Thread

Transport Package

Bulk in Carton or Box

Specification

Dia. 3-5mm

Trademark

Origin

China

HS Code

7318140000

Production Capacity

1000ton/Month

Key features

Customizable Thread Type: Available in Fine or Coarse Thread options to suit specific installation needs.

High Hardness Material: Made from Hardened Carbon Steel C1022A with surface hardness 560-653HV.

Corrosion Resistance: Undergoes 48H Salt Spray Test with options like Zinc Plated or Black Phosphated.

Wide Size Range: Shank Dia 3-5mm and Length 13-200mm available in various standard sizes.

OEM/ODM Support: Factory supports customization from designs and samples with professional testing.

Versatile Application: Ideal for fixing plasterboard to iron sheets (max 0.9mm) or wooden structures.

Certified Quality: Products certified with ISO, GS, RoHS, and CE standards for global compliance.

Factory Direct Price: Direct factory pricing ensures competitive costs without compromising quality.

Company profile

Importers and ExportersHigh Repeat Buyers ChoicePatents AwardedNational Award received

QINGDAO ZONGYU INDUSTRY AND TRADE CO., LTD.

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs CertifiedExport Year: 5 years CertifiedNearest Port: Qingdao PortAverage Response Time: ≤3.57h

AI-Powered supplier vetting

SummaryThe supplier is a Qingdao-based manufacturer and trading company with a broad registered business scope covering mechanical equipment, metal products, automotive parts, plastic products, building materials, and import/export activities. It reports ISO 9001, 14001, and 18001 certification history, eight production lines, 50 quality-control staff, and stated production capacity for several nail categories. The supplier offers customization from designs and samples, ODM, and OEM services for well-known brands. However, it reported no new products in the past year, lacks overseas warehouses, showrooms, agents, or branches, and has weak documented service-management controls: no written service-assessment or corrective-action procedures and no complaint-handling records. Financial information is identified for 2021–2023, but the slices do not provide performance values, so financial credibility cannot be fully assessed.

Supplier typeThe supplier operates as a manufacturer and trading company: its registered scope includes sales and import/export activities, while its factory information reports eight production lines and product-specific output. Its company description also states more than 20 years of development and business relationships across Europe, America, Southeast Asia, and Africa.

CertificationsThe supplier states that it passed ISO 9001, ISO 14001, and ISO 18001 international management-system certifications in 2001. This is explicit certification evidence, although the slice does not provide current certificate validity or renewal details.

After-Sales capabilityThe supplier has a complaint-handling procedure but no written complaint records, and it lacks written procedures or records for service-capability assessment and corrective/preventive actions. It has participated in the Canton Fair but reports no overseas warehouses, showrooms, agents, or branches, limiting evidence of structured overseas after-sales support.

R&D capabilityThe supplier reports ODM capability, an available SDK, and one internationally recognized design award. However, it also states that no new products were developed in the past year; this indicates some design and development resources but limited recent product-innovation evidence.

Production capacityThe supplier reports eight production lines, 50 quality-control staff, and stated annual outputs of 10,000 tons each for U-type, roofing, twisted, clout, and common nails. It also reports a one-month average lead time in both peak and off-season, supporting evidence of established production capacity, though the stated output figures are supplier-reported and not independently verified.

Customization capabilityThe supplier explicitly provides customization from customer designs and samples, ODM services, and OEM services for well-known brands. These statements directly demonstrate multiple forms of customization and contract-manufacturing capability.