Can I mix different models in one container?

Yes, different models can be mixed in one container, but the quantity of each model should not be less than MOQ.

How does your factory do regarding quality control?

We always pay great attention to quality control from the very beginning and every product was tested piece by piece before delivery.

Do you have quality certification?

Yes, we have CE, SGS, ISO, ect.

Black Phosphate Fine and Coarse Thread Self-Tapping Drywall Screw

Name: Black Phosphate Fine and Coarse Thread Self-Tapping Drywall Screw
Brand: TIANJIN GRAND METAL CO., LTD.
SKU: 1917741742

Tianjin, ChinaTIANJIN GRAND METAL CO., LTD.

US$1,250.00-1,350.00

2 Tons

Product profile

Material

Carbon Steel

Type

Bugle Head

Groove

Cross

Model NO.

Connection

Common Bolt

Head Style

Bugle Head

Standard

Grade

Perfect

Tail

Self-Drilling/Self-Tapping

Thread

Fine Thread / Coarse Thread

Surface Treatment

Zinc Plated/Nick Plated/Black Phosphated

Application

Wood, Drywall, Gypsum Board

Transport Package

500g/Bag, 1kg/Bag, 5kg/Box, or Bulk N.W.20kgs/CTN

Specification

All size, M3.5X13-M4.8X200 / 6#x5/8~ 14#X3''

Trademark

GRANDMETAL

Origin

China

HS Code

73170000

Production Capacity

1000tons Per Month

Key features

Self-Drilling & Self-Tapping: Tail type designed for efficient drilling and tapping in wood, drywall, and gypsum board.

Multiple Surface Treatments: Available in Black Phosphate, Grey Phosphate, Zinc Plated, and Nickel Plated options.

Customizable Thread Types: Offer both Fine Thread and Coarse Thread configurations to meet specific requirements.

Wide Size Range: Diameter options from M3.5 to M6.3 and #6 to #14; Lengths from 11mm to 150mm.

High Corrosion Resistance: Salt mist resistance time ranges from 24 to 1000 hours depending on treatment.

OEM Service Available: Full OEM customization support including custom printing and design assistance.

Certified Quality Standards: Products comply with ISO9001, GB/T701-2008, CE, SGS, and other international standards.

Flexible Packaging Options: Customizable packing including bags, boxes, bulk, and pallets with moisture protection.

Company profile

TIANJIN GRAND METAL CO., LTD.

Tianjin, China

CertifiedBusiness Type: Trading Company CertifiedCustomization Options: Customization from Samples CertifiedExport Year: 10 Years CertifiedNearest Port: Tianjin PortAverage Response Time: ≤2.34h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryThe supplier presents itself as a specialized steel manufacturer and exporter with four production lines, 50 quality-control staff, and export markets in South America, Africa, and Australia. It reports customization from samples and lead times within 15 working days in both peak and off-season periods. However, the investigation identifies limited documented management evidence: no stated 3D design, ODM, SDK, or popular-brand OEM capability; no inventory, overseas warehouse, overseas showroom, overseas agent, or branch capability; and no participation in offline trade shows. Supplier-management, corrective-action, and complaint-handling procedures exist but lack written records, while quality-control testing equipment is reported as zero. Certification details are recorded only as “Others,” and the financial slices contain zero values for several recent indicators, making financial credibility difficult to verify.

Supplier typeThe supplier is explicitly described as a specialized steel manufacturer with an integrated research, manufacturing, and distribution system, while another slice states it is not a professional technical supplier. This supports classification as a steel manufacturing/export supplier rather than a professional technical-services supplier.

R&D capabilityThe supplier claims technical research strength and product-detection equipment, but the investigation records only one year of total R&D-engineer experience, no new products in the past year, and no 3D software design, ODM, SDK, or popular-brand OEM capability. The evidence shows limited demonstrated innovation capability.

Production capacityThe supplier reports four production lines, 50 quality-control staff, and a specialized steel manufacturing operation, with lead times within 15 working days in both peak and off-season. However, quality-control test equipment is reported as zero, and quality assurance and traceability statuses are unknown, so production capacity is supported but production-control maturity is not fully established.

Customization capabilityThe supplier explicitly provides customization from samples and accepts several quotation and payment terms, indicating an ability to support sample-based customization. No broader engineering, 3D-design, ODM, or SDK capability is reported.