Medeco 2020777 6-Pin Key-in-Knob Cylinder for Corbin Russwin 6600 Old Series, CK3400 & CK4400

Medeco 2020777 6-Pin Key-in-Knob Cylinder for Corbin Russwin 6600 Old Series, CK3400 & CK4400

The Medeco 2020777 is a 6-pin Key-in-Knob/Lever retrofit cylinder engineered to fit Corbin Russwin 6600 Old Series, CK3400, and CK4400 knob and lever cylindrical locksets. Constructed of durable machined brass components, this cylinder is designed to retrofit knob type cylindrical locksets, lever type cylindrical locksets, padlocks, and bored type auxiliary deadlatches and deadlocks without requiring full lockset replacement. Medeco M4 Key-in-Knob cylinders carry UL437 listing for drill and pick resistance along with utility patent-pending key control, and are certified to ANSI A156.30 Level A and ANSI A156.5 Grade 1 for demanding commercial applications.

Key Features

• 6-Pin Cylinder Configuration: Features a 6-pin tumbler design for enhanced security and key control in commercial cylindrical locksets.
• Retrofit Compatibility: Designed specifically to fit Corbin Russwin 6600 Old Series, CK3400, and CK4400 knob and lever locksets, eliminating the need for complete lockset replacement.
• UL437 Listed: Medeco M4 Key-in-Knob cylinders are UL437 listed for drill and pick resistance, providing a high level of physical security.
• Patent-Pending Key Control: Utility patent-pending key control technology restricts unauthorized key duplication for superior access management.
• Durable Machined Brass Construction: Cylinders are constructed of durable machined brass components for long-lasting performance in heavy-use commercial environments.
• Broad Retrofit Range: Medeco offers over 100 different cylinder designs and tailpiece configurations, supporting the most popular security hardware and minimizing full lockset replacements.
• Multiple Finish Options: Available in 14 finishes including Bright Brass (05), Satin Brass (06), Antique Brass (09), Satin Brass Blackened (10), Bright Bronze (11), Satin Bronze (12), Oil Rubbed Bronze (13), Bright Nickel (18), Satin Nickel (19), Antique Nickel (20), Black (22), Dark Bronze (24), Bright Chrome (25), and Satin Chrome (26).

Certifications & Compliance

• UL437 Listed for Drill and Pick Resistance (Medeco M4)
• ANSI A156.30 Level A — Patent-Protected Key Control and Physical Strength (M4, M3)
• ANSI A156.5 Grade 1 — Consistent Quality for Heavy-Use Applications (M4/M4 BiLevel, M3)

Technical Specifications

• Product Family: Key-in-Knob/Lever Cylinder
• Pinning: 6-Pin
• Compatible Hardware: Corbin Russwin 6600 Old Series, CK3400 & CK4400 Knob
• Certification: UL 437 Listed; ANSI/BHMA A156.30 (M4); ANSI/BHMA A156.5 Grade 1 (M4)
• Construction: Durable machined brass components
• Warranty: 2-year manufacturer's warranty

Typical Applications

• Commercial Office Buildings
• Educational Facilities
• Healthcare Institutions
• Retail Establishments
• Government and Municipal Buildings
• Industrial and Warehouse Facilities
• Multi-Tenant Residential Properties

Why Medeco?

Medeco cylinders are engineered from durable machined brass components and certified to ANSI A156.30 Level A and ANSI A156.5 Grade 1, ensuring both physical strength and consistent quality in high-traffic commercial environments. With UL437 listing for drill and pick resistance and patent-pending key control, the Medeco 2020777 delivers professional-grade security for facilities that demand reliable, high-security access management.