Corbin Russwin CK4251 Heavy Duty Commercial Entrance Knob Lock

SKU: CK4251 The Corbin Russwin CK4251 Grade 1 heavy-duty Entrance knob is ideal for demanding, high-use commercial, industrial and institutional applications.

  • Instructions & Templates

Heavy Duty Commercial Entrance Knob Lock

Serial no. / SKU: CK4251

Product Overview

  • Heavy duty cylindrical entrance key in knob lockset
  • Door thickness -1-3/4" - 2".
  • Meets A156.2 Series 4000, Grade 1
  • 2-3/4" backset.
  • Latchbolt-Brass, chrome plated, 5/8" throw with nylon insert, 2-1/4" x 1-1/8" front
  • Strike-ANSI curved lip standard, 4-7/8" x 1-1/4" x 1-1/4" lip to center.
  • Cylinder-6-pin, Corbin keyways-0 bitted, ready to be keyed, prepped for Corbin RC core less core,
    Prepped for Best IC core-less core, available in GRC knob and satin chrome finish only or less cylinder.

Heavy Duty Commercial Entrance Knob Lock

Serial no. / SKU: CK4251

Technical Specifications

  • Listed for A Label and lesser class single doors, 4' x 8'.
  • Function - Entrance-ANSI F81.
  • Deadlocking latchbolt by knob either side, except when turn button locks outside knob.
  • Key outside retracts latchbolt.
  • Outside knob unlocked by turn button.
  • Inside knob always free.
  • Meets A156.2 Series 4000, Grade 1.
  • Avaliable as a special order with other finishes, and backset. Contact us directly to arrange your special order.

Heavy Duty Commercial Entrance Knob Lock

Serial no. / SKU: CK4251

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Heavy Duty Commercial Entrance Knob Lock

Serial no. / SKU: CK4251

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