How long does production take?

The normal production lead time is 30-35 days.

What types of doors is this lock suitable for?

It is suitable for wooden, metal, fire, smoke, interior, and outer swing doors.

What are the available forend shapes?

Forend shapes available are Round Head and Square Head.

Heavy Duty Four Bolt Mortise Lock Body for High Security Commercial Doors

Name: Heavy Duty Four Bolt Mortise Lock Body for High Security Commercial Doors
Brand: D&D HARDWARE INDUSTRIAL CO., LIMITED
SKU: 2147689905

Guangdong, ChinaD&D HARDWARE INDUSTRIAL CO., LIMITED

US$4.78

500-2,999 Pieces

US$4.30

3,000-4,999 Pieces

US$3.87

5,000+ Pieces

Sample price:US$7.17/piece.Request sample

Product profile

Customization

Available

After-sales Service

Online Technical Support

Warranty

5 Year

Model NO.

DDML061

Material

Stainless Steel

Type

Key Lock

Style

European

Shape

Mortise Door Lock

Anti-theft Standard

Part

Lock

Backset

55mm

Door Thickness Fits

Customized

Usage

Household Door Locks, Bedroom, Channel Lock

Backset Available

55mm

Distance

85mm

Forend & Strike Plate

Square or Radius

Finish

SSS, Pss, PVD, Pb, Ab, AC

Feature

Durable, Easy Installation

Application

Commercial or Residential Building

Suitable for Door

Wooden, Metal, Fire, Smoke, Interior, Outer, Swing

Transport Package

White Box or Color Box, Carton Packing

Specification

EN standard

Trademark

D&D or mark client's logo

Origin

Jiangmen Guangdong, China

HS Code

8301600000

Production Capacity

200, 000 Sets/Month

Key features

High Security Four Deadbolt Design: Equipped with 4 solid deadbolts with 2-turn travel, greatly improves anti-prying and anti-forced entry performance.

Optional Latch Bolt Configurations: Choose oblique tongue or round tongue; latch bolt available in SUS304 or zinc alloy to meet diverse project budgets.

SUS304 Forend & Strike Plate: Stainless steel fittings deliver superior corrosion resistance and long service life.

Standard Universal Dimensions: 50mm backset and 85mm centre distance, fits conventional security door machining sizes.

Multiple Surface Finishes: SSS, PSS, PVD, PB, AB, AC finishes to coordinate with matching door hardware sets.

5-Year Mechanical Warranty: Ensures durable and stable long-term operation for security entry door projects.

Company profile

Importers and ExportersExhibition ExperienceOEM ServicesHigh Repeat Buyers Choice

D&D HARDWARE INDUSTRIAL CO., LIMITED

Guangdong, China

Business Type: Manufacturer/FactoryExport Year: 2021-10-12Nearest Port: Jiangmen, Guangzhou, ShenzhenAverage Response Time: ≤3.97hTerms of Payment: LC, T/T, D/P, etc.International Commercial Terms(Incoterms): FOB, EXW, DDP, CIF, DAP

AI-Powered supplier vetting

SummaryThe supplier is identified as a factory in Jiangmen, with a stated business scope covering sales and production of hardware, building materials, household products, appliances, and bathroom fixtures, as well as related R&D and import/export activities. It reports substantial export activity, self-operated import/export rights, OEM service for well-known brands, ODM service, and broad customization capabilities. Innovation evidence includes two R&D engineers and new products launched during the past year, but no SDK is available. Service operations have several documented procedural gaps: complaint handling, supplier assessment, and corrective/preventive actions reportedly lack written records, while overseas warehouses, showrooms, agents, and branches are unavailable. Quality-control evidence is incomplete, with zero stated test equipment and unknown quality assurance and traceability status. No certification information or explicit customer case details are provided.

After-Sales capabilityThe supplier has a complaint-handling procedure, but no written records, and its service-capability assessment and corrective/preventive-action procedures likewise lack records. It has no overseas warehouse, showroom, agent, or branch, although it can provide international quotation terms and reports peak-season lead time of one month. The evidence shows basic service procedures and export coordination, but significant limitations in documented after-sales execution and overseas support.

R&D capabilityThe supplier reports two R&D engineers, new products launched during the past year, R&D responsibilities covering new product development and technical support, and ODM service. However, it has no available SDK, and the small stated R&D team provides only limited evidence of scale. The supplier demonstrates active product-development capability, though its technical-development resources appear limited.

Production capacityThe supplier is identified as a factory with production in its business scope, reports 50 qualified service-capability suppliers, exports 71%–90% of total sales, has self-operated import/export rights, and states off-season lead time within 15 workdays and peak-season lead time of one month. Against this, quality assurance and traceability status are unknown, and the stated quantity of quality-control test equipment is zero. Production and export capability are indicated, but quality-control infrastructure presents an explicit deficiency.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also reports ODM service availability, providing direct evidence of broad product-design and customization support.