BEST 45HCA Series Heavy Duty Mortise Lockbody with Holdback Function - Field ReversibleProfessional Grade Mortise Lock Solution for Commercial ApplicationsThe BEST 45HCA Series represents heavy-duty mortise lock engineering designed for demanding commercial environments. This field-reversible lockbody features a 2-3/4" backset with solid stainless steel components and Grade 1 operational strength per ANSI A156.13 standards. The case construction utilizes 0.095" cold rolled steel measuring 5-7/8" H x 7/8" D x 4-1/16" W for exceptional durability in high-traffic applications.Professional Features & BenefitsHeavy-Duty Case Construction: 0.095" cold rolled steel case with zinc dichromate plating provides superior corrosion protection and structural integrity for commercial applications.Enhanced Latch Design: Solid one-piece stainless steel anti-friction latch delivers 50% more surface contact with strike for superior strength and security with precision-engineered curve for extended cycle life.Field-Reversible Operation: Reversible latch rotates 180 degrees for easy handing change without opening case, plus 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.Grade 1 Performance: ANSI A156.13 Series 1000 Grade 1 Operation and Strength certification with Grade 2 Security for professional reliability.Advanced Security Features: Solid machined cylinder rings with wavy washer provides wrenching resistance, plus cylinder security screw prevents core removal.Roller Bearing Mechanism: Smooth, wear-resistant operation with lever return spring mechanism in trim for enhanced protection against lever droop.Antimicrobial Finish Options: Available with UltraShield antimicrobial protected coating (626AM, 630AM) for healthcare and high-cleanliness 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 thick door configuration up to 5"), 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 with appropriate clearances for installation.Install lockbody into mortise pocket and secure with four case cover screws at each corner for enhanced case integrity.Configure four-position hub toggle to determine locked/unlocked operation for each hub based on application requirements.Test latch and deadbolt operation to verify proper alignment, smooth function, and complete 3/4" latch throw and 1" deadbolt throw. Refer to manufacturer documentation for complete installation details and troubleshooting.Professional ApplicationsCommercial Office BuildingsEducational FacilitiesHealthcare InstitutionsGovernment and Municipal BuildingsIndustrial and Warehouse FacilitiesMulti-Tenant Residential PropertiesHigh-Security Commercial EnvironmentsWhy 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. The Grade 1 operational strength certification and enhanced case integrity design with four corner screws plus interlocking armored front ensure dependable performance in high-traffic environments. Multiple finish options including antimicrobial coatings provide versatility for specialized applications where cleanliness is a priority.