BEST 45HCA Series Heavy Duty Mortise Lock with Classroom Holdback FunctionProfessional-Grade Mortise Lock Solution for Educational FacilitiesThe BEST 45HCA Series delivers heavy-duty mortise lock performance with specialized classroom holdback (RHB) functionality for educational and commercial applications. This field-reversible lockbody features a 2-3/4″ backset, solid stainless steel anti-friction latch with 3/4″ throw, and 1″ deadbolt throw for enhanced security. Manufactured from 0.095″ cold rolled steel with zinc dichromate plating, this ANSI A156.13 Grade 1 Operation and Strength rated lock provides superior durability for high-traffic institutional environments.Professional Features & BenefitsHeavy-Duty Construction: 0.095″ cold rolled steel case, cover, and armored front with zinc dichromate plating for exceptional strength and corrosion resistance.Enhanced Latch Design: Solid one-piece stainless steel anti-friction latch provides 50% more surface contact with strike for superior strength and security with precision-engineered curve for enhanced cycle life.Field-Reversible Operation: Reversible latch rotates 180 degrees for easy handing change without opening case, with four position hub toggle design for flexible configuration.Armored Front Protection: Completely surrounds latch and deadbolt providing increased lateral strength with staked assembly design for self-alignment during installation.Roller Bearing Hub Mechanism: Provides smooth, wear-resistant operation with enhanced case integrity through four corner case cover screws and interlocking design.Visual Lock Indication: Clear indication of locked and unlocked states with optional visual indicator showing padlock icons for immediate status recognition.ANSI Grade 1 Compliance: Meets ANSI A156.13 Series 1000 Grade 1 Operation and Strength requirements with Grade 2 Security rating for institutional applications.Antimicrobial Finish Options: Available with UltraShield antimicrobial protected coating (626AM, 630AM) for healthcare, education, and food service applications.Technical Specifications45H Series The design and operation of the BEST mortise lock meets the intent of the standard for ANSI A117.1 section 404.2.6.Builders Hardware Manufacturers Association:45H Series ANSI A156.13, Series 1000, Grade 1 Operation and Strength, Grade 2 Security. To meet Grade 1 Security, a drill resistant core (1CD, 1CDP, 1CDF, or 1CDX) must be used with escutcheon trims, and 1EK7K4 high security cylinder must be used with sectional trims.47H Series ANSI A156.13, Series 1000, Grade 1 Operational, Strength, and SecurityAuxiliary bolt Stainless steel, non-handed.Backset 2-3/4″Case 0.095 cold rolled steel, 5- 7/8″ H x 7/8″ D x 4-1/16″ W. Steel is zinc dichromate plated for corrosion protection.Deadbolt Stainless steel, 1″ throw.Latchbolt Solid stainless steel, 3/4″ throw. Latch is oil-impregnated for anti-friction operation. Reversible without opening case.Strike For complete strike package specs see page 5.Door Thickness Standard lock configuration designed for doors 1-3/4″ thick. Thick door configuration available for doors up to 5″ thick (specify thickness when ordering).Faceplate Stainless steel, brass or bronze material, 8″ H x 1-1/4″ W x 1/16″ T. Lock face automatically adjusts to proper bevel during installation.Products protected by one or more of the following patents: 4,873,853 5,590,555 5,794,472Finishes 605 – bright brass, clear coated 606 satin brass, clear coated 611 bright bronze, clear coated 612 satin bronze, clear coated 613* oxidized satin bronze, oil rubbed 618 bright nickel plated, clear coated (brass base material) 619 satin nickel plated, clear coated (brass base material) 622 flat black coated (brass base material) 625 brightchromium plated (brass base material) 626 satin chromium plated (brass base material) 629 bright stainless steel 630 satin stainless steel 690* dark bronze coated (brass base material)*613 finish is designed to wear over time, providing an antique appearance.*690 finish will continue as a dark brown appearance over time.Antimicrobial Finish 626AM satin chrome plated with UltraShield antimicrobial protected coating 630AM satin stainless steel with UltraShield antimicrobial protected coatingThe BEST UltraShield finish inhibits the growth of bacteria and other microbes on the surface of the hardware.NOTE: BEST UltraShieldTM option is recommended for use on any hardware application where product cleanliness is a high priority. i.e;. Hospital/Healthcare, Elderly Care, Education, Transportation, Food-Service, Hospitality.Installation & OperationReview manufacturer specifications and verify door preparation requirements including door thickness (standard 1-3/4″ or up to 5″ thick door configuration), mortise pocket dimensions, and handing requirements.Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper backset alignment.Prepare door mortise pocket to accommodate case dimensions of 5-7/8″ H x 7/8″ D x 4-1/16″ W and route faceplate opening for 8″ H x 1-1/4″ W stainless steel faceplate.Install lockbody into mortise pocket ensuring armored front self-aligns with door bevel during installation and secure with appropriate fasteners.Configure four position hub toggle settings to determine locked/unlocked operation for each hub and adjust latch hand if needed using 180-degree rotation feature.Test lock operation including latchbolt and deadbolt function, visual indicators, and classroom holdback operation to verify proper installation and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.Professional ApplicationsEducational Facility ClassroomsInstitutional BuildingsHealthcare Facility Patient RoomsCommercial Office BuildingsGovernment and Municipal BuildingsMulti-Tenant Residential PropertiesHigh-Security Commercial ApplicationsAntimicrobial Protection OptionAvailable with UltraShield antimicrobial protected coating in satin chrome (626AM) and satin stainless steel (630AM) finishes. The BEST UltraShield finish inhibits the growth of bacteria and other microbes on the surface of the hardware, recommended for applications where product cleanliness is a high priority including healthcare, education, food service, and hospitality environments.Why Choose BEST Quality?BEST 45HCA Series mortise locks deliver professional-grade reliability with 0.095″ cold rolled steel construction and solid stainless steel components engineered for demanding commercial applications. ANSI A156.13 Grade 1 Operation and Strength certification ensures dependable performance in high-traffic institutional environments where security and durability are essential. Advanced features like the roller bearing hub mechanism and anti-friction latch design provide enhanced cycle life and smooth operation for years of reliable service.