Medeco M3 Standard 6-Pin Mortise Cylinder, 1-1/8" to 1-3/4", Straight Cam, DL Keyway — High Security UL437 Certified
The Medeco M3 Standard 6-Pin Mortise Cylinder is a high-security, UL437-certified cylinder lock engineered for demanding commercial and institutional applications. Featuring Medeco's proprietary M3 sidebar technology, this mortise cylinder is threaded on the outside shell for straightforward installation into standard mortise lock cases from leading manufacturers, with a rear-mounted cam engaging the locking mechanism and a set screw securing the cylinder in place. Sized from 1-1/8" to 1-3/4" with a straight cam and DL keyway, this 6-pin cylinder delivers superior attack resistance and patented key control in a brass construction rated Grade 1 Heavy Duty.
Key Features
- Length Range: Accommodates door applications from 1-1/8" to 1-3/4", providing versatile fit across a wide range of standard mortise lock cases.
- M3 Sidebar Technology: The sidebar locking mechanism prevents the key from turning until it is elevated, rotated, and properly aligned — offering enhanced protection against picking and bumping.
- Proprietary Angle-Cut Keys: Medeco's angled cuts and restricted key blanks make unauthorized duplication virtually impossible, ensuring strict key control.
- UL437 Certified: Certified to UL437 standards, confirming resistance to physical attacks including drilling, picking, and bumping.
- Patented Key Control: Keys cannot be duplicated without authorization, protecting the integrity of your master key system over the full lifecycle of the hardware.
- Brass Construction: Manufactured from brass for long-term durability and corrosion resistance in heavy-duty commercial environments.
- Retrofittable Design: Threaded outer shell installs easily into existing standard mortise lock cases from other leading manufacturers, simplifying upgrades without full hardware replacement.
- Master Key System Compatibility: Compatible with M4 BiLevel and larger Medeco master key systems, supporting complex keying hierarchies including keyed alike, keyed different, and master keyed configurations.
Certifications & Compliance
- UL437 Certified — Resistance to drilling, picking, and bumping verified
- ANSI/BHMA Grade 1
- Heavy Duty Duty Level
Technical Specifications
- Product Group: Parts and Accessories
- Cylinder and Keyways: DL Keyway, 6-Pin
- Grade: Grade 1
- Duty Level: Heavy Duty
- Technology: M3
- Product Model: 100200T
- Product Category: Parts and Accessories
- Product Substrate: Brass
Typical Applications
- Commercial Office Buildings
- Government and Municipal Buildings
- Educational Institutions
- Healthcare Facilities
- Retail Storefronts
- Multi-Unit Residential Properties
- Institutional Security Upgrades and Retrofits
Why Medeco M3?
Medeco M3 mortise cylinders are built from brass with Grade 1 Heavy Duty ratings and UL437 certification, delivering verified resistance to drilling, picking, and bumping in the most demanding commercial environments. The proprietary sidebar mechanism and angle-cut restricted keyway system provide a level of key control and physical security that standard cylinders simply cannot match, making Medeco the trusted choice for facilities where access integrity is non-negotiable.
Manufacturer Resources
Product Specs
- Subcategory:
- Mortise
- Product Group:
- Parts and Accessories
- Product Subgroup:
- Cylinders
- Product Type:
- Mortise Cylinder
- Cylinder and Keyways:
- DL Keyway, 6-Pin
- Commercial/Residential:
- Commercial
- Grade:
- Grade 1
- Duty Level:
- Heavy Duty
- Technology:
- M3
- Tags:
- medeco cylinder lock, medeco mortise cylinder, medeco m3 cylinder
- Product Model:
- 100200T
- Product Category:
- Parts and Accessories
- Product Substrate:
- Brass
- Department:
- Door Hardware