Does the product come with a warranty?

Yes, the product includes a guarantee/warranty as part of our quality assurance.

Can I get a sample before placing a bulk order?

Yes, free samples are available for small packages, but you need to cover the shipping cost via DHL, TNT, UPS, or FedEX.

What is the lead time for production?

The average lead time is one month, regardless of peak or off-peak seasons.

Concealed Hinges 180 Opening Angle

Name: Concealed Hinges 180 Opening Angle
Brand: Dongguan Shengang Precision Metal & Electronic Co., Ltd.
SKU: 882436655

Guangdong, ChinaDongguan Shengang Precision Metal & Electronic Co., Ltd.

US$1.00-15.00

1,000 Pieces

Sample price:US$50.00/piece.Request sample

Product profile

Customization

Available

Type

180°Hinge

Finish

Baking in Silver, Black

Model NO.

SG-HC3040

Material

Zinc Alloy

Name

Concealed Hinges 180 Opening Angle

Size

140*135*18*21*23mm

Hinge Material

Zamak

Open Angle

180 Degree

Min. Door Thinckness

30mm

Max. Door Weight

40kg/2PCS

Cover

Iron

Finishing

Baking in Black & Silver

Transport Package

White Inner Boxes, Yellow-Brown Outer Cartons.

Specification

140*135*18*21*23mm

Origin

China

HS Code

8302100000

Production Capacity

100000PCS

Key features

180 Degree Opening Angle: Provides full 180-degree opening for easy access and ventilation.

Three-Dimensional Adjustment: Adjustable in side, height, and compression for precise installation.

High Load Capacity: Supports up to 40kg per pair with durable zinc alloy construction.

Concealed Design: Completely hidden mechanism for a clean, modern aesthetic look.

Universal Compatibility: Suitable for wood, steel, aluminum doors and various frame types.

OEM/ODM Service: Customization available for name, size, and finishing options.

Safety Feature: Finger protection design with a small gap between door and frame.

Maintenance-Free: Equipped with slide bearings requiring no regular maintenance.

Company profile

Dongguan Shengang Precision Metal & Electronic Co., Ltd.

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 19 Years CertifiedNearest Port: Shenzhen Port, Guangzhou PortAverage Response Time: ≤3.30h

AI-Powered supplier vetting

SummaryDongguan Shengang Precision Metal & Electronic Co., Ltd. is a China-based limited trading/manufacturing company established in 2007, with a stated founding description also referring to February 2000. It operates from Dongguan, Guangdong, with 117 employees, a 5,550 m² manufacturing plant, six production lines, and 5 R&D engineers. Its product range centers on door and window hardware, including hinges, locks, handles, closers, stoppers, and sliding or folding-door fittings. The supplier reports ISO 9001:2015 certification, OEM/ODM cooperation, international export coverage, and sales in Europe, America, Southeast Asia, and the Middle East. Production-management and technical capabilities are supported by stated equipment, engineers, quality-control personnel, and testing activities. However, the provided information does not substantiate after-sales procedures, financial strength, specific customer cases, or measurable customization performance.

Supplier typeThe supplier is identified as a China-based limited company and trade company, while its descriptions also characterize it as an international manufacturer integrating R&D, production, and sales of door and window hardware. This indicates a combined trading and manufacturing profile rather than a purely trading entity.

CertificationsThe supplier explicitly reports holding an ISO 9001:2015 certificate for its management system. This is direct evidence of a recognized quality-management certification, although the scope and validity details are not provided.

R&D capabilityThe supplier reports advanced production equipment, leading production technologies, 5 R&D engineers, mold-making and product-testing activities, and multiple product types including adjustable concealed and casement hinges. These statements directly support active technical development and product innovation capability.

Production capacityThe supplier reports a 5,550 m² manufacturing plant, six production lines, advanced equipment, production technologies, dozens of production staff, quality-control personnel, and a production-management system. Its stated product scope and broad export markets further indicate established operating capacity.

Customization capabilityThe supplier states that its engineers conduct R&D, mold making, production and processing, and product testing, and that it cooperates with international brands through OEM and ODM. These activities explicitly support customization capability, although no customization examples, minimum quantities, or technical limits are specified.