BEST 1EJ/1EK Series High Security 7-Pin Mortise Cylinder with Interchangeable Core

BEST 1EJ/1EK Series High Security 7-Pin Mortise Cylinder with Interchangeable Core

Professional High Security Cylinder Solution

The BEST 1EJ/1EK Series high security mortise cylinder delivers professional-grade security with UL437 standard compliance and ANSI A156.5 Grade 1A certification. This 7-pin cylinder features a 1-5/32" diameter with hardened stainless steel alloy construction and includes a special 5C interchangeable core for maximum security applications. The cylinder provides enhanced protection through its stainless steel ring, face, and keyway disc design with 630 nickel-plated satin stainless steel finish.

Professional Features & Benefits

• High Security Construction: Hardened stainless steel alloy ring, face and keyway disc provide exceptional resistance to tampering and forced entry attempts.
• UL437 Standard Compliance: Listed by Underwriters Laboratories for key locks, ensuring verified security performance for critical applications.
• ANSI A156.5 Grade 1A Certification: Meets the highest commercial grade standards for mortise cylinder performance and durability.
• Precision Threading: 1.150-32 (NS-2A) threaded design with 15/32" diameter ensures secure mounting and proper alignment.
• 7-Pin Configuration: 1-11/16" mounting length accommodates standard mortise lock preparations with enhanced key control.
• Interchangeable Core System: Special 5C core allows for easy rekeying and master key system integration without cylinder replacement.
• Wrench-Resistant Design: High-security cylinder rings machined from stainless steel and hardened to prevent unauthorized removal.
• Professional Finish: 630 nickel-plated satin stainless steel finish provides corrosion resistance and professional appearance.

Technical Specifications

• Collection: E Series Cylinders
• Commercial/Residential: Residential
• Department: Door Hardware
• Parts and Accessories Type: Replacement Parts
• Product Attribute: Parts and Accessories
• Product Category: Mechanical Locks
• Product Group: Parts and Accessories
• Product Subgroup: Cylinders
• Product Type: Cylinders
• Series: 1EJ/1EK Series
• Subcategory: Parts and Accessories

Installation & Operation

This high security mortise cylinder is designed for use with compatible BEST mortise lock systems. Special door preparation is required with a 1-3/4" diameter hole for proper installation. The 1EJ7J4 cylinder must be combinated at the factory, while the 1EK7K4 cylinder is available uncombinated where UL listing is not required. Refer to manufacturer documentation for complete installation specifications and core configuration procedures.

Professional Applications

• High Security Commercial Buildings
• Government and Municipal Facilities
• Financial Institution Security Systems
• Healthcare Facility Restricted Areas
• Educational Institution Administrative Offices
• Industrial Facility Secure Storage
• Multi-Tenant Residential Master Key Systems

Why Choose BEST Quality?

BEST high security cylinders deliver professional-grade protection with UL437 listing and ANSI A156.5 Grade 1A certification for demanding security applications. The hardened stainless steel construction and precision manufacturing ensure reliable performance in critical access control situations. Engineered for professional locksmiths and security professionals who require the highest level of cylinder security and key control.