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LH Series Cylindrical Lock

ANSI Grade 1 Extra Heavy Duty


  • Extra Heavy duty, commercial grade cylindrical lockset, designed for maximum security, heavy traffic usage and fast, easy installation.
  • Knobs include steel reinforcement.
  • Internal steel mechanisms are corrosion treated for normal atmospheric conditions.
  • Heat treated heavy gauge cold rolled steel spindles add greater strength and security.
  • Threaded roses both sides hold lock firmly in place.


Applications• Heavy duty commercial, institutional, governmental and industrial buildings where high quality mechanism is required.
Door Thickness• 1 3/8″ to 2″ thickness wood or metal door installation.
Backset• 2 3/4″ standard, 2 3/8″, 3 3/4″ and 5″ optional.
Latchbolt• 1/2″ throw, UL listed, faceplate self-adjusted, 3/4″ throw fire door deadlatch available.
Handing• Completely reversible.
Strike• ANSI strike standard, T-strike or Full lip strike optional.
Trim• Roses are heavy wrought brass, bronze or stainless steel, installed over wrought steel reinforcing plates.
• Knobs are brass, bronze or stainless steel, secured by steel knob retainer which cannot be depressed when lock has been locked.
Door Preparation• 2 1/8″ cross bore, 1″ edge bore.
Master Keying• Can be masterkeyed or grand masterkeyed.
Interchangeable Core• 6 or 7-pin, Compatible with Best® and Falcon® small format interchangeable cores.
Finishes• 605, 606, 612, 613, 625, 626, 629 and 630.
Certifications• UL listed for “A” label (3-hour) single swinging door (4′ x 8′).
• ANSI/BHMA A156.2, Series 4000 Grade 1.

Headquarters and Operation Office

I-TEK Metal Manufacturing Co., Ltd.

Global Office


BHMA, UL, Intertek
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