What materials are available for production?

Carbon steel, stainless steel, alloy steel, copper, titanium, PEEK, nylon and other special engineering materials.

In-stock standard items support small orders; customized non-standard fasteners depend on drawing details.

What surface treatments can you provide?

Black phosphate, zinc plating, black zinc, hot-dip galvanized, nickel plating, Dacromet and other customized finishes.

What industries do your fasteners widely apply to?

New energy, automotive, petrochemical, steel structure, home appliance, machinery and infrastructure projects.

Heavy-Duty Waterproof Roof Fixing Screws with Bonded Washers

Name: Heavy-Duty Waterproof Roof Fixing Screws with Bonded Washers
Brand: Qingdao Vanhon Machinery Technology Co., Ltd.
SKU: 2301507905

Shandong, ChinaQingdao Vanhon Machinery Technology Co., Ltd.

US$750.00-900.00

1 Ton

Product specifications

DIN7982

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

Material

Carbon Steel

Shape of Head

Bugle Head,Phillips Drive

Surface Finishing

Zinc Plated

Certification

Customized

Non-Customized

Finishes

Black/Grey Phosphated, Zinc Plated, Nickel Plated

Carbon Steel

C1018/C1022

Application

Drywall, Plasterboard, Partition Wall, Ceiling, Wo

Feature

Bugle Head, Sharp Point, High Tensile

Thread Size

2.2, M2.9, M3.5, M4.2, M4.8, M5.5, M6.3

Length

6.5mm, 9.5mm, 13mm, 16mm, 19mm, 22mm, 25mm, 32mm,

Head Type

Cross Recessed Countersunk Head (Phillips)

Type

Self-Tapping Screw, Drywall Screw, Plasterboard Sc

Standard

DIN7982, ISO.ANSI. BS.DIN.JIS.GB.etc

Grade

4.8, 8.8, 10.9, A2-70 , A4-80

Packing

Bulk ,Plain Box, Color Box, Poly Bag, PP Box + Woo

Transport Package

Box, Carton, Pallet

Specification

#6(3.5mm),#7(3.9mm),#8(4.2mm),#10(4.8mm),#12(5.5mm

Trademark

vkf

Origin

China

HS Code

7318140000

Production Capacity

300 Tons/Month

Key features

Integrated bonded EPDM rubber washer for full waterproof sealing

Galvanized finish for outstanding rust & corrosion resistance

Hex flange head design for stable torque & uniform compression

Precision hardened self-drilling tip, no pre-drilling required

High-strength quenched steel body with tight thread fit

Factory bulk supply with competitive wholesale price, custom service available

Integrated bonded EPDM rubber washer delivers superior waterproof sealing, effectively prevents rain seepage and roof water leakage under long-term outdoor exposure.

Widely versatile application for metal roofing, wall cladding, purlin, solar bracket, carport and prefabricated steel structure installation.

Custom size and surface treatment available to support OEM & ODM orders.

Temperature-resistant EPDM gasket keeps stable elasticity under high or low temperature, no aging cracking for long outdoor service life.

Company profile

OEM ServicesMulti-language PioneerImporters and ExportersHigh Repeat Buyers Choice

Qingdao Vanhon Machinery Technology Co., Ltd.

Shandong, China

Business Type: Manufacturer/Factory CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc.Export Year: 2023-03-01Nearest Port: shanghai, tianjin, ningboAverage Response Time: ≤0.01h

AI-Powered supplier vetting

SummaryQingdao Vanhon Machinery Technology Co., Ltd. is identified as a trading company and limited company offering vehicle lifts, simple parking lifts, lift accessories, and hardware accessories. It reports OEM service for popular brands, broad customization options, inventory capability, and substantial export orientation, with Europe and North America listed as primary markets. However, the supplier has only four employees and one R&D engineer, launched no new products in the previous year, has no available SDK, and holds no stated management-system certifications. Quality-control evidence is weak: test equipment is reported as zero, while quality assurance and traceability statuses are unknown. Written procedures are absent for corrective actions and complaint handling. Financial records are referenced for three years, but no financial results are provided. No specific customer cases are disclosed, although OEM service for well-known brands is explicitly claimed.

CertificationsThe supplier’s certification of management systems is explicitly recorded as “NIL.” No certification is identified in the provided information, so there is no evidence of certification-based compliance strength.

After-Sales capabilityThe supplier has inventory service capability and accepts multiple payment methods, but it has no written procedures or records for corrective and preventive actions or effective customer-complaint handling. Its service-capability assessment has relevant records but no written procedure, and it has no overseas warehouse or showroom.

R&D capabilityThe supplier reports one R&D engineer with one year of total R&D experience, launched no new products during the previous year, and has no available SDK. These explicit indicators show limited demonstrated innovation activity, although design and customization services are available.

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