Does the hinge offer finger protection?

Yes, the design includes a small gap between the door and frame to prevent finger injuries.

What is the minimum door thickness required?

The minimum door thickness required for installation is 30mm.

Are OEM and ODM services available?

Yes, both OEM and ODM services are available for this product.

180 Degree Adjustable Hidden Invisible Hinges Adjust Zinc Alloy Concealed Hinge

Name: 180 Degree Adjustable Hidden Invisible Hinges Adjust Zinc Alloy Concealed Hinge
Brand: Dongguan Shengang Precision Metal & Electronic Co., Ltd.
SKU: 840390665

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

Zinc Alloy 180 Degree Adjustable Invisible Hinge

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 door clearance with a maximum 180-degree opening capability.

Three-Dimensional Adjustment: Easily adjustable in side, height, and compression dimensions for perfect alignment.

High Load Capacity: Supports up to 40kg (88 lbs) per pair of hinges for heavy-duty use.

Durable Zinc Alloy Material: Constructed from high-quality Zamak zinc alloy for long-lasting performance.

Completely Concealed Design: Hidden invisible hinge system ensures a clean, seamless look for any door.

Versatile Door Compatibility: Suitable for wood, hollow metal, and aluminum doors with various frame types.

Finger Protection Feature: Small gap between door and frame prevents finger pinching injuries.

Maintenance-Free Bearings: Equipped with slide bearings that require no lubrication or 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: ≤2.03h

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.