China Rectangular Padlock Manufacturer, OEM/ODM Factory

Rectangular Padlock is the go-to format for warehouses, gates, containers and cargo transportation, where a standard padlock feels too light for the job. The classic rectangular body is spacious enough to hold a larger lock cylinder and a thicker shackle. The series from Zhejiang Rongtao Hardware Products Co., Ltd., a China Rectangular Padlock Manufacturer based in Yiwu City, Zhejiang Province, covers three models: Brass Rectangular Padlock, Armoured Brass Rectangular Padlock and Iron Rectangular Padlock. Sizes run from 50 mm to 100 mm across the range, and each model uses a horizontal-opening structure with a key. As a Custom Rectangular Padlock Manufacturer and OEM/ODM Rectangular Padlock Factory, Rongtao supports brand LOGO laser marking and packaging customization on all three models.

Rectangular Padlock Basics: Why the Horizontal-Opening Design Matters

The short answer is that a rectangular padlock is built around a spacious body, an enclosed structure and a horizontal-opening lock. According to Zhejiang Rongtao Hardware Products Co., Ltd., the series is widely used in industrial and commercial applications requiring high security, such as warehouses, gates, containers and cargo transportation, and it offers a durable structure, reliable performance and high cost-effectiveness. The company owns the Yiwu Shengping Lock Factory, which has nearly 30 years of professional padlock manufacturing experience, so the rectangular series draws on a long padlock production background.

Spacious rectangular lock bodyThe classic rectangular design leaves room for larger lock cylinders and thicker shackles, which the series description links to excellent security performance.

Side-opening horizontal unlockingThe Brass model uses a side-opening horizontal insertion unlocking structure that differs from conventional top-opening padlocks. The Armoured Brass and Iron models are also horizontal-opening designs.

Enclosed structureThe Brass model has an enclosed cavity structure that provides no leverage points for crowbars, and the Iron model is based on a fully enclosed box structure.

Brass and iron with multiple finishesThe series is available in brass and iron, with surface treatment options such as polishing, electroplating and powder coating.

Rectangular Padlock Models Compared

The table below compares the three models listed on the Rongtao Rectangular Padlock page, using the parameters published on each product page.

Parameter	Brass Rectangular Padlock	Armoured Brass Rectangular Padlock	Iron Rectangular Padlock
Lock Body	Brass, made from a whole piece of brass	Brass lock body and cylinder inside an external steel shell	High-Quality Cast Iron, integrated solid body
Shackle	Hardened Steel	Hardened Steel, thickened, solid and quenched	A3 Steel
Size Options	50, 60, 70, 80, 90 mm	60, 70, 80, 90 mm	50, 60, 70, 80, 90, 100 mm
Surface Treatment	Polishing / Brushing, brushed finish	Polishing / Brushing, shell with matte spray coating	Electroplating
Unlocking	Key, side-opening horizontal insertion	Key, horizontal-opening	Key, horizontal-opening
Number of Keys	3 Keys	3 Keys	3 Keys
Packaging	Blister Card	Blister Card	Blister Packaging
Positioning	High-security heavy-duty anti-theft padlock	High-protection horizontal-opening anti-theft padlock	Economical horizontal-opening anti-theft padlock

All three models are key operated and list 3 keys. Zhejiang Rongtao Hardware Products Co., Ltd. positions the Brass model as a high-security heavy-duty anti-theft padlock, the Armoured Brass model as a high-protection option, and the Iron model as the economical choice for basic security locking.

Brass Rectangular Padlock: Solid Brass Body with a Side-Opening Lock

The Brass Rectangular Padlock uses a lock body made from a whole piece of brass through precision grinding and forming, paired with a thickened hardened shackle and standard metal keys. The side-opening horizontal insertion design gives it a solid and heavy-duty feel. Zhejiang Rongtao Hardware Products Co., Ltd. also established Yiwu Rongtao Renewable Resources Co., Ltd. to keep strict control over raw materials for padlock production, a point that matters for a series built on brass and iron bodies.

50 to 90 mm Five size options: 50, 60, 70, 80 and 90 mm. Lock body in brass, hardened steel shackle, 3 keys, blister card packaging.

Pure brass lock body that is rust-resistant and corrosion-resistant, with a high-end texture and long service life
Hardened shackle that resists sawing and prying
Enclosed cavity structure with no leverage points for crowbars, for higher anti-theft performance
Brushed finish with a compact structure and no gaps
Built-in precision brass lock cylinder with smooth key insertion and removal, stable rebound and a low failure rate

Armoured Brass Rectangular Padlock: Steel Shell over a Brass Core

The Armoured Brass Rectangular Padlock combines the impact resistance of an external steel shell with the rust resistance and smooth operation of a brass lock cylinder. It is offered in 60, 70, 80 and 90 mm and is described as a high-protection horizontal-opening anti-theft padlock.

Thickened solid steel shackle, quenched and hardened

Outer layer: thickened steel shell with matte spray coating

Middle layer: brass lock body

Core: brass pin tumbler lock cylinder

The outer thickened steel shell resists impact, grinding and violent destruction.
The quenched and hardened shackle has high hardness and strong resistance to cutting and bending, with enhanced load-bearing and anti-theft performance.
Resistance against sawing, prying and violent damage is described as far superior to ordinary curved shackle padlocks.
The matte spray coating resists scratches and fading and is not easy to corrode under outdoor sunlight and rain exposure.
The brass pin tumbler cylinder has excellent wear resistance and keeps smooth operation after frequent long-term use.

Iron Rectangular Padlock: Economical Horizontal-Opening Protection

The Iron Rectangular Padlock is the economical option in the series. It features an integrated solid iron lock body, listed as high-quality cast iron, with electroplated surface treatment and a fully enclosed box structure. It combines reliable physical protection with affordable usage costs, and the shackle is A3 steel. Zhejiang Rongtao Hardware Products Co., Ltd., which serves customers in more than 20 export countries, highlights this model for its lower cost in large-scale installation and use across homes, factories and warehouses.

6 sizes from 50 to 100 mm

High-quality iron material that is sturdy and durable, with high cost-effectiveness
Stable and reliable basic anti-theft and load-bearing performance
Electroplated body with a wear-resistant, scratch-resistant surface that is not easy to fade or peel off
Fine surface treatment with long-lasting gloss
Complete specifications available, with outstanding cost performance for large-scale installation

Rectangular Padlock Size Coverage

Size is the fastest way to filter the range. The Iron model is the only one listed at 100 mm, the Armoured Brass model starts at 60 mm, and the Brass model starts at 50 mm. The matrix below shows every size listed on the product pages.

Model	50 mm	60 mm	70 mm	80 mm	90 mm	100 mm
Brass Rectangular Padlock
Armoured Brass Rectangular Padlock
Iron Rectangular Padlock

Rectangular Padlock Applications

The Brass and Armoured Brass models share one application list built around heavy-duty access points, while the Iron model lists a wider range of conventional security locking scenarios.

Brass and Armoured Brass Models

Warehouse gates
Cargo containers
Storage cages
Truck cargo boxes
Warehouse doors
Equipment rooms
Large distribution boxes
Pipeline valves
Factory heavy-duty toolboxes

Iron Model

Warehouse doors
Truck cargo boxes
Storage cages
Construction site fence gates
Factory toolboxes
Ordinary distribution boxes
Storage rooms
Courtyard iron gates
Garage small doors
Simple public facilities in industrial parks

Brass A solid brass body and a heavy-duty feel for high-security locking.

Armoured Brass A steel shell for impact, grinding and outdoor sunlight and rain exposure.

Iron Economical protection for large-scale installation and basic security needs.

OEM/ODM Rectangular Padlock Factory: Customization Options

Custom Rectangular Padlock Manufacturer

Zhejiang Rongtao Hardware Products Co., Ltd. describes itself as a lock source factory with over 30 years of experience that supports customized designs. Its 18,000 sqm factory area and 100 employees stand behind the OEM/ODM service, and the company names integrity and on-time delivery as its commitments to clients worldwide.

Brand LOGO Laser MarkingListed on the Brass, Armoured Brass and Iron models.

Packaging CustomizationListed on all three models. Standard packaging is a blister card for the Brass and Armoured Brass models and blister packaging for the Iron model.

Surface Treatment RangeThe series offers polishing, electroplating and powder coating as surface treatment options.

How to Prepare a Rectangular Padlock Inquiry

Six details are enough to start a quotation for a Rectangular Padlock order. Zhejiang Rongtao Hardware Products Co., Ltd. publishes its website in English, French, Spanish, German, Arabic and Italian, so overseas buyers can review these product details in their own language before sending the inquiry.

Rectangular Padlock Inquiry Sheet

ModelBrass, Armoured Brass or Iron

Size50 to 90 mm for Brass, 60 to 90 mm for Armoured Brass, 50 to 100 mm for Iron

SurfacePolishing / Brushing, matte spray shell or electroplating

PackagingBlister Card or Blister Packaging

CustomizationBrand LOGO laser marking, packaging customization

ApplicationWarehouse, container, cargo box, gate or distribution box

Ready to send an inquiry? Contact Tony Xu at sales2@chinajiuzhou.com or WhatsApp +86-13735613379.

View the Rectangular Padlock Series

Rectangular Padlock FAQ

What is a rectangular padlock and how does it open?

A rectangular padlock has a classic rectangular body that is spacious enough for larger lock cylinders and thicker shackles. In the Rongtao range, the Brass model uses a side-opening horizontal insertion unlocking structure that differs from conventional top-opening padlocks, and the Armoured Brass and Iron models are horizontal-opening designs. All three are key operated.

Why does the enclosed cavity structure matter?

The Brass Rectangular Padlock has an enclosed cavity structure that provides no leverage points for crowbars, which supports higher anti-theft performance, and its brushed body is compact with no gaps. The Iron model is likewise based on a fully enclosed box structure.

What is the difference between the Brass and Armoured Brass rectangular padlocks?

The Brass model has a lock body made from a whole piece of brass and comes in 50 to 90 mm. The Armoured Brass model places brass parts inside an external thickened steel shell with a matte rust-resistant treatment, adds a thickened solid steel shackle that is quenched and hardened, and comes in 60 to 90 mm.

Is an iron rectangular padlock a good choice for large-scale installation?

The Iron Rectangular Padlock is designed as an economical horizontal-opening padlock with stable basic anti-theft and load-bearing performance, and Zhejiang Rongtao Hardware Products Co., Ltd. notes a lower cost for large-scale installation and use. It is listed for construction site fence gates, storage rooms, courtyard iron gates, garage small doors and simple public facilities in industrial parks. For higher protection, the company offers the Brass and Armoured Brass models.

Which rectangular padlock is suited to outdoor use?

The Armoured Brass model has a matte spray-coated shell that resists scratches and fading and is not easy to corrode under outdoor sunlight and rain exposure. The Brass model has a pure brass body that is rust-resistant and corrosion-resistant, and the Iron model has an electroplated surface that is wear-resistant, scratch-resistant and not easy to fade or peel off.

Which rectangular padlock suits cargo containers and truck cargo boxes?

The Brass and Armoured Brass models list cargo containers, truck cargo boxes, storage cages, warehouse gates and warehouse doors among their applications. The Iron model lists truck cargo boxes, storage cages and warehouse doors, and the series as a whole is described for warehouses, gates, containers and cargo transportation.

What size range do rectangular padlocks come in?

The Brass model is listed at 50, 60, 70, 80 and 90 mm, the Armoured Brass model at 60, 70, 80 and 90 mm, and the Iron model at 50, 60, 70, 80, 90 and 100 mm. The Iron model is the only one that reaches 100 mm.

What shackle materials do rectangular padlocks use?

The Brass model uses a hardened shackle that resists sawing and prying. The Armoured Brass model uses a thickened solid steel shackle that is quenched and hardened for strong resistance to cutting and bending. The Iron model uses an A3 steel shackle.

What surface finishes are available on rectangular padlocks?

The series offers surface treatment options such as polishing, electroplating and powder coating. On the product pages, the Brass model has a brushed finish, the Armoured Brass model has a matte spray-coated steel shell, and the Iron model is electroplated.

What packaging do rectangular padlocks come in?

The Brass and Armoured Brass models list a blister card, and the Iron model lists blister packaging. Packaging customization and brand LOGO laser marking are offered on all three models, so buyers can request packaging that fits their own brand.