School Security – Grade 1 Cylindrical Locks

GT Series Classroom Intruder

PDQ’s GT Series Grade 1 Cylindrical Locks offer best in class performance and value. Patented School Security Classroom Intruder Function is designed to keep staff and students safe in the event of an emergency lockdown.

  • Quick and simple testing inside the classroom, no need to go outside of the classroom to test the lock.
  • Red LED indicator confirms the lever is locked from the inside of the classroom.
  • Arrow shows the direction to turn the key for rapid lockdown, especially helpful in a panic situation.
  • Built from the Grade 1 GT extra heavy-duty cylindrical lock.

    Proudly made in Lancaster, Pennsylvania, USA



    For Doors:
    • 1-3/4” to 2-1/4” thick
    • Preset for 1-3/4” door
    • Through door thru-bolting
    Door Prep:
    • Standard ANSI A156.115 (161) for Cylindrical Locks
    • 2-3/4” Standard. 3-3/4” and 5” Optional (Ordered from factory only).
    • Heavy duty zinc diecast, investment cast, chromated cold rolled steel, stainless steel and EZAC™ diecast mechanism. Billet Steel spindles for locking functions
    • 2-1/4” x 1-1/8”
    • Stainless Steel or Wrought Brass
    • Beveled 1/8” in 2”
    • ASA standard
    • T-Strike or Full Lip Strike optional
    • Stainless Steel or Wrought Brass
    • 9/16” Throw Deadlocking
    • 3/4” Latch projection for available as option.
    • Non-handed
    • Solid Zinc diecast PHL, BSN or MIA Levers
    • 41° Lever Rotation Standard with 2-3/4” backset
    • Wrought Brass Roses, Concealed Screws
    • 65° Lever Rotation Standard with 3/4” latch for double doors (Ordered from factory only) and all 3-3/4” and 5” backsets (Ordered from factory only)
    • Two (2) per Lock
    • SCC standard (Schlage C Compatible)
    • Also available in keyways of other manufacturers
    Interchangeable Core:
    • Available for all keyed functions
    • 6 or 7-pin
    • Large Format IC Core available for PHL Lever ONLY.
    • Compatible with Best, Falcon and Arrow.
    • 6-pin Brass Insert Cylinder keyed to 5-pins
    • Options: MK, CMK or GMK
    • Zero Bitted (KO), Keyed Different (KD) or Keyed Alike (KA)
    • Can be keyed into existing master key systems
    • 605 )US3) Bright Brass, 613 (US10B) Oil rubbed Bronze, 619 (US15) Satin Nickel, 626 (US26D) Satin Chrome
    • Other finishes available. Contact PDQ Customer Service
    • Optional Antimicrobial Coating 626 (USD26D) only‡
    Certifications, Listings Compliances:
    • UL/CUL 10C listed for 3 hrs, for single doors up to 4’0” x 8’0”
    • Certified to ANSI/BHMA A156.2-2011, Grade 1
    • California Education Code Compliant (Functions GT135, GT135LED, GT145)
    • Federal Specification FF-H-10C (Superseded by A156.2)
    • Florida Building Code HVHZ (High Velocity Hurricane Zone) listed, FL21376. Maximum design load rating: ± 70 PSF for single doors 3' x 7'.
    • Complies with ADA (Americans with Disabilities Act) and ICC/ANSI 117.1 for Accessible and Usable Buildings
    • Twenty-five (25) year Limited Warranty
    Country of Origin:
    • Proudly Assembled in the U.S.A. with U.S. and foreign material. Meets requirements of the Buy American Act.

    Functions – School Security

    GT Series - Functions

    Architectural Finishes

    • 626 (US26D) - Satin Chrome Plated, No Coating

    Electronic Access Control

    Fail Safe/Fail Secure Electrical Specifications:
    • Input voltage: 12-24VDC or 12-24VAC.
    • 24 Volts AC/DC +/- 10%
    • Operating Current: .150A
    • 12 Volts AC/DC +/- 10%
    • Operating Current: .250A
    • Includes rectifier for AC voltage
    • Solenoid operated

    Cross Reference

    GT Series - Cross Reference


    • Factory tested to over 3 million cycles (3 times the ANSI/BHMA Grade 1 standard)
    • Lever torque tested to over 2,100 in-lbs (3 times the ANSI/BHMA Grade 1 standard)



    How to Order

    GT Series - How to Order

    How to Order – Electronic Access Control

    GT Series - How to Order