What is the lead time for production?

Off-season lead time is within 15 workdays. Peak season lead time is 1-3 months. Specific times depend on order quantity.

What packing methods are available?

Options include Bale Packing (25kgs/carton or bag, 1 ton/box), Individual Box with logo, and master carton + pallet. Custom packing is supported.

What is the warranty or quality guarantee?

We provide pre-production samples, strict in-process inspection, and final inspection before shipment to ensure quality meets standards.

Building Roofing Tek Screws with Rubber Washers Tornillos Hexagonal Hex Head Self Drilling Screws

Name: Building Roofing Tek Screws with Rubber Washers Tornillos Hexagonal Hex Head Self Drilling Screws
Brand: Newspider Tianjin Impex Co., Ltd.
SKU: 2151313502

Tianjin, ChinaNewspider Tianjin Impex Co., Ltd.

US$1.30

1,000-9,999 kg

US$1.26

10,000-26,999 kg

US$1.20

27,000+ kg

Product specifications

type

length

Diameter

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Material

Carbon Steel

Type

Hexagon Head

Model NO.

Hex Head Self-drilling Screw with Black Washer

Groove

Hexagon

Connection

Common Bolt

Head Style

Hexagonal

Standard

DIN, GB, ANSI, BSW

Grade

Class 8.8

Productname

DIN 7504-K Hex Head Self Drilling Screw

Surface Treatment

Blue White Zinc Plating

Groove Type

Hex Head

Washer Type

Black PVC Rubber Washer

Thread Type

Standard Thread

Point

Drill Point

Measurement

Inch,Metric System

Diameter

8#-14# (4.2mm-6.3mm) or as Request

Length

3/4-8-2/3(19mm-220mm) or as Request

Single Gross Weight

25.000kg

Package

Small Box+ Carton or as Request

Selling Units

Single Item

Single Package Size

28X26.5X23.Cm

MOQ

1 Ton Per Size

Transport Package

Carton

Specification

C1022A

Trademark

OEM

Origin

Tianjin-China

HS Code

7318120090

Production Capacity

5000 Tons

Key features

High-Strength Material: Made of Carbon Steel C1022A with Grade 8.8 for enhanced strength and durability.

Versatile Applications: Suitable for metal-to-metal, metal-to-wood fastening, roofing, walling, and fencing.

Customizable Options: Diameter, length, surface treatment, and packing can be customized as requested.

Multiple Surface Treatments: Available in Blue/White Zinc Plating, Ruspert, Dacromet, and Painting for corrosion resistance.

Efficient Self-Drilling: Drill point enables fastening without pilot holes, suitable for metal and plastic sheets.

Secure Hex Head Design: Hexagonal head provides larger contact area, withstands high torque, and prevents slippage.

Various Washer Options: Compatible with PVC, EPDM bonded, Steel, and Rubber washers for waterproofing.

Professional Manufacturing: Produced by experienced manufacturer with strict quality control and inspection processes.

Company profile

Importers and ExportersFast DeliveryQuality AssuranceStandardized quality control

Newspider Tianjin Impex Co., Ltd.

Tianjin, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from SamplesExport Year: 2017-03-17Nearest Port: TianjinAverage Response Time: ≤2.98h

AI-Powered supplier vetting

SummaryThe supplier is identified as a professional technical supplier providing 3D software design, ODM, OEM, and sample-based customization. It reports more than 40 employees, separate production and packing workshops, experienced workers, process inspection, annual production of about 5,000 tons, and supply to more than 20 countries. However, it has no stated inventory, overseas warehouse, overseas showroom, overseas agent or branch, and no offline trade-show participation. Manufacturing capacity lacks a valid contract with related subcontractors. Quality and complaint-handling procedures are documented and followed, but no certification is identified. Innovation evidence is limited because no new products were reported in the past year and no SDK is available. Financial credibility cannot be reliably assessed because the supplied financial records are incomplete and inconsistent. ERP integration and several related digital systems are absent or recorded as zero.

Supplier typeThe supplier explicitly identifies itself as a professional technical supplier, offers 3D software design, ODM, and OEM services, and operates production and packing workshops for screw manufacturing. This indicates a manufacturer with technical design and contract-manufacturing capabilities.

After-Sales capabilityThe supplier has documented and followed procedures for customer complaints, supplier-service assessment, and corrective/preventive actions. However, it reports no overseas warehouse, showroom, agent, branch, or inventory capability, limiting evidence of localized after-sales support.

Production capacityThe supplier reports separate production and packing workshops, more than 40 employees, experienced workers, process inspection, annual production of about 5,000 tons, and lead times within 15 workdays to one month. Against this, it has no valid contract with related subcontractors and no inventory capability; overall manufacturing capacity is explicitly supported, though supply-chain controls have limitations.

Customization capabilityCustomization is explicitly available from samples, and the supplier states that screw customization is available across quantities and sizes. Its 3D design, ODM, and OEM services further support tailored product development.

Client casesThe supplier states that it has supplied products to more than 20 countries and provides OEM services for well-known brands. These statements constitute direct evidence of international customer experience, although no customer names or detailed case examples are provided.

Product Q&A

Q:What are the available diameter and length ranges?

Diameters range from 4.2mm to 6.3mm (Inch #8 to #14). Lengths range from 13mm to 300mm (Metric) or 1/2' to 12' (Inch). Custom sizes are also available.

Q:What surface treatments are available?

Options include Blue/White Zinc Plating, Yellow Galvanized, Ruspert (500-1500hr), Dacromet (500-1500hr), and Painting. Custom treatments are accepted.

Q:Can the product be customized?

Yes, customization is available for diameter, length, surface treatment, and packing. OEM and ODM services are supported.

Q:What is the minimum order quantity (MOQ)?

The MOQ is 1 Ton per size. However, custom packing and smaller quantities may be discussed upon request.

Q:What payment terms are accepted?

Accepted payment types include T/T, L/C at sight, and PayPal. Currencies accepted are USD, EUR, and CNY.