Medeco 20200A1 6-Pin Key-in-Knob/Lever Retrofit Cylinder for Arrow MK SeriesThe Medeco 20200A1 is a 6-pin Key-in-Knob/Lever retrofit cylinder engineered to replace cylinders in knob-type cylindrical locksets, lever-type cylindrical locksets, padlocks, and bored-type auxiliary deadlatches and deadlocks including the Arrow MK Series. Constructed of durable machined brass components, this cylinder delivers the high-security performance Medeco is known for, with ANSI A156.30 Level A certification for patent-protected key control and ANSI A156.5 Grade 1 certification for consistent quality in heavy-use commercial applications. The Medeco 4 (M4) platform is UL437 listed for drill and pick resistance, making it a trusted choice for demanding security environments.Key Features6-Pin Cylinder Configuration: Features a 6-pin tumbler design for enhanced security and key control in commercial-grade applications.Retrofit Compatibility: Designed to retrofit knob-type cylindrical locksets, lever-type cylindrical locksets, padlocks, and bored-type auxiliary deadlatches and deadlocks, including the Arrow MK Series.UL437 Listed (M4): Medeco 4 (M4) Key-in-Knob cylinders are UL437 listed for drill and pick resistance, providing verified protection against forced entry.Patent-Protected Key Control: ANSI A156.30 Level A certification assures patent-protected key control and physical strength (M4, M3), limiting unauthorized key duplication.Heavy-Use Grade 1 Quality: ANSI A156.5 Grade 1 certification assures consistent quality and performance for heavy-use commercial applications (M4/M4 BiLevel, M3).Durable Machined Brass Construction: Cylinders are constructed of durable machined brass components for long-lasting reliability in high-traffic commercial environments.Broad Finish Selection: 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).Industry-Leading Retrofit Range: Medeco offers over 100 different cylinder designs and tailpiece configurations, enabling the largest retrofit capability in the industry and reducing the need for complete lockset replacements.Certifications & ComplianceUL437 Listed Drill and Pick Resistance (Medeco 4 / M4)ANSI A156.30 Level A Patent-Protected Key Control and Physical Strength (M4, M3)ANSI A156.5 Grade 1 Heavy-Use Commercial Quality (M4/M4 BiLevel, M3)Technical SpecificationsProduct Family: Key-in-Knob/Lever CylinderPinning: 6-PinCompatible Hardware: Arrow MK SeriesCertification: UL 437 Listed; ANSI/BHMA A156.30 (M4); ANSI/BHMA A156.5 Grade 1 (M4)Construction: Durable machined brass componentsWarranty: 2-year manufacturer’s warrantyTypical ApplicationsCommercial Office BuildingsEducational FacilitiesHealthcare InstitutionsRetail EstablishmentsGovernment and Municipal BuildingsIndustrial and Warehouse FacilitiesMulti-Tenant Residential and Mixed-Use PropertiesWhy Medeco?Medeco Key-in-Knob/Lever cylinders are built from durable machined brass components and backed by UL437 listing for drill and pick resistance, along with ANSI A156.30 Level A and ANSI A156.5 Grade 1 certifications. With over 100 cylinder designs and tailpiece configurations available, Medeco delivers the industry’s broadest retrofit capability minimizing full lockset replacements while maximizing security and key control in commercial door hardware applications.