What certifications does the manufacturer have?

We have passed ISO9001 certification to ensure quality control and stable product standards.

What after-sales services are provided?

We provide online technical support and a 1-year warranty covering return and replacement.

What is the production process used?

We use investment casting (lost-wax casting) combined with precision machining to ensure high quality.

Stainless Steel Adjustable Square Handrail Tube Connector for Stair Railing

Name: Stainless Steel Adjustable Square Handrail Tube Connector for Stair Railing
Brand: Dongying Highco Metal Manufacturing Co., Ltd.
SKU: 2194303455

Shandong, ChinaDongying Highco Metal Manufacturing Co., Ltd.

US$1.99-10.99

100 pieces

Sample price:US$11.99/piece.Request sample

Product profile

Customization

Available

After-sales Service

Online Support, Return and Replacement

Warranty

1 Year

Model NO.

ST0550 S

Customized

Function

Decoration

Style

Modern, European

Stair Railing / Handrail

Stainless Steel

Baluster

Stainless Steel

Stair Tread

Stainless Steel

Product Name

Stainless Steel Square Handrail Connector

Size

50.8X50.8mm

Production Process

Investment Casting

Project Solution Capability

Graphic Design, 3D Model Design

Design Style

Contemporary

Handrail Thickness

1.5mm

After-Sale Service

Online Technical Support

Application

Staircase

Surface Treatment

Satin Polished

Trademark

Highco-Cast

Origin

Shandong, China

HS Code

83024100

Production Capacity

50000 PCS/Year

Key features

Customized Design Service: Supports custom sizes, 3D model design, and graphic design based on customer samples or drawings.

Premium Material Quality: Made from high-grade Stainless Steel 316 with satin polished surface treatment for durability.

1-Year Warranty Coverage: Provides a 1-year warranty with online technical support for after-sales assurance.

Professional Expertise: Team with over 15 years of experience in mould design, casting, and surface treatment.

ISO9001 Certified Quality: Manufacturing process controlled by ISO9001 certification with 100% finished product inspection.

Versatile Application: Ideal for staircase handrails, specifically fitting 50.8x50.8mm square tubes.

Low MOQ Flexibility: Minimum Order Quantity is just 1 piece, suitable for small batches and samples.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceSelf-brandedPatents Awarded

Dongying Highco Metal Manufacturing Co., Ltd.

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples CertifiedExport Year: 6 Years CertifiedNearest Port: Qingdao PortAverage Response Time: ≤2.65h

AI-Powered supplier vetting

SummaryDongying Highco Metal Manufacturing Co., Ltd. is identified as a limited, combined-type supplier and is described elsewhere as a trading company engaged in precision mechanical equipment processing and sales, precision castings, ship accessories, and automotive accessories. It offers steel castings and has OEM experience with well-known brands, export capability, in-stock service, and a stated 90% export-sales share. Its facilities include CNC lathes, drilling, polishing, pressing, and related equipment, with sample-based customization. Quality and complaint-handling procedures are documented and followed, although the approved-supplier list lacks signatures or dates. Key limitations are the absence of an available SDK, valid manufacturing-capacity contracts with associated subcontractors, overseas warehouses, overseas agents or branches, overseas showrooms, and offline trade-show participation. Financial information is limited to year labels without assessable financial values. An audit by TÜV Rheinland...

Supplier typeThe supplier is listed as a limited company with a combined organizational type, while its company nature is identified as a trading company. Its stated business scope covers processing and sales of precision mechanical equipment and accessories, precision castings, ship accessories, and automotive accessories; the primary offered product is steel casting.

CertificationsThe supplier is explicitly stated to hold a valid import and export license. A TÜV Rheinland audit is also recorded with coverage from April 24, 2025 to April 23, 2026, but the audit type is given only as “1” and the evaluation result as “0,” without an interpretable certification or pass description.

After-Sales capabilityThe supplier lists overseas service offerings including debugging, maintenance, repair, training, and equipment installation, and has documented, followed procedures for corrective actions and customer complaints. However, it has no overseas agents or branches, serves zero stated countries, and has no overseas warehouse or showroom, limiting demonstrated international service infrastructure.

Production capacityThe supplier reports in-stock capacity, a facility containing CNC lathes, lathes, drilling, polishing, pressing, and digital-caliper equipment, and 90% of sales from exports with self-operated import/export rights. It also reports written and followed inspection, supplier-capability assessment, corrective-action, and complaint procedures, although there is no valid manufacturing-capacity contract with the factory and associated subcontractors and the supplier reports zero cooperative suppliers.

Customization capabilityThe supplier explicitly provides customization from samples and has OEM capability for well-known brands, directly supporting its ability to produce customized products based on customer samples or brand requirements. No broader design-development or SDK capability is established.