HK Series

Arrow’s HK Series Grade 1 cylindrical knob locks are designed and tested for the most robust applications. Backed by the Arrow 10 year warranty and Certified to BHMA Grade 1 it is the worry free solution when a Grade 1 knob lock is needed.


  • ANSI/BHMA A156.2, Series 4000, Grade 1
  • Underwriters Laboratories (UL and CUL) listed for use on 3 hour, A label single swinging doors



Lock Chassis: Cold rolled steel with zinc dichromate finish for corrosion resistance. Latch retractor is precision cast steel. Requires standard 2-1/8" (53.97 mm) bore through door.

Door Thickness: 1-3/8" (35 mm) to 2" (50.80 mm)

Latch: Stainless steel with 1/2" (12.7 mm) throw. Latch housing is steel, zinc dichromate finish for corrosion resistance. 1" (25.4mm) bore in edge of door required.

Latch Front: Brass or stainless steel, 2-1/4" (57.15 mm) x 1-1/8" (28.57 mm), beveled 1/8" (3.17 mm) in 2" (50.8 mm)

Strike: Brass or stainless steel. ANSI A115.2, 4-7/8" (123.82 mm) x 1-1/4" (31.75 mm) curved lip standard with a 1-1/4" (31.75mm) lip to center dimension.

Handing: Reversible.

Cylinder, Standard: Solid brass, 6 pin cylinder with Arrow “AR” keyway or "CS" keyway. Supplied with two 6 pin nickel silver keys.

Cylinder Options: Interchangeable core–lockset prepared for use with 6 or 7 pin interchangeable core. SFIC format. Supplied less core. Will accept Best™ and Falcon™ type cores. Suffix “IC” to design.

Finish: US3,613E,US32D.

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