Arrow Lock HK33-BB-605 Grade 1 Asylum Lock

Arrow HK33-BB-605 Grade 1 Asylum Lock delivers exceptional security and reliability in high-demand environments. This Grade 1 cylindrical knob lock features a robust ball knob design, crafted for durability and ease of use. Its conventional cylinder is finished in bright brass, offering an attractive aesthetic while ensuring long-lasting performance. Engineered to meet strict BHMA Grade 1 standards, this lock is ideal for institutional applications. The lock chassis is constructed from cold-rolled steel with a corrosion-resistant zinc dichromate finish, while the precision stainless steel latch retractor enhances functionality. Designed for doors with a thickness ranging from 1-3/8" to 2", installation is straightforward with a standard 2-1/8" bore. The HK series lock includes a stainless steel latch with a ½" throw and is reversible for flexible handing. It supports a solid brass 6-pin cylinder and comes with two nickel-plated brass keys, ensuring reliable access control. For added versatility, an interchangeable core option is available, prepared for 6 or 7 pin cores. Backed by a 10-year warranty and classified for 3-hour fire ratings, the Arrow HK33-BB-605 lock provides peace of mind for commercial spaces while combining functionality with elegant design. Enhance your security measures with this dependable locking solution.

Grade 1 Asylum Lock

Grade 1 Asylum Cylindrical Lock, Ball Knob, Conventional Cylinder, Bright Brass Finish, Non-handed

The HK series Grade 1 Cylindrical Knob lock is designed and tested for the most robust applications for Grade 1 knob locksets. 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.

The Arrow HK Series is a Grade 1 Knob Lock that comes in a variety of finishes and functions.

• Lock Chassis – Cold rolled steel with zinc dichromate finish for corrosion resistance. Latch retractor is precision stainless steel. Requires standard 2-1/8" (53.97mm) bore through door.
• Door Thickness – 1-3/8" (35mm) to 2" (50.80mm)
• Latch – Stainless steel with 1/2" (12.7mm) 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" (57.15mm) x 1-1/8" (28.57mm), beveled 1/8" (3.17mm) in 2" (50.8mm)
• Handing – Reversible. 
• Strike – Brass or stainless steel. ANSI A115.2,4-7/8" (123.82mm) x 1-1/4" (31.75mm) curved lip standard with a 1-1/4" (31.75mm) lip to center dimension.
• Cylinder, Standard – Solid brass 6 pin cylinder supplied with two 6 pin nickel plated brass keys. Available in Arrow AR or Schlage CS keyway.
• Cylinder Options – Interchangeable core-lockset prepared for use with 6 or 7 pin interchangeable core available. SFIC format. Supplied less core. Suffix "IC" to design.

Resources

• HK Series Cylindrical Lock Cut Sheet
• HK Series Grade 1 Cylindrical Knob Locks Cut Sheet