Arrow Lock MK33-BD-26D-LC Grade 2 Asylum Function Knob

Arrow MK33-BD-26D-LC Grade 2 Asylum Function Knob offers a reliable solution for commercial applications requiring accessibility without the need for heavy-duty hardware. This Grade 2 cylindrical lock features a sleek ball knob design and comes in a sophisticated satin chrome finish that complements various architectural styles. Constructed from cold-rolled steel with a zinc dichromate finish, the lock chassis ensures durability and corrosion resistance. It accommodates standard door thicknesses ranging from 1-3/8" to 1-3/4" and requires a 2-1/8" bore through the door. The non-handed design simplifies installation, making it suitable for versatile applications. The MK Series provides a range of finishes and functions, including the asylum function, making it ideal for institutional settings. It includes a solid brass, 6-pin cylinder with an Arrow "A" keyway, which is master keyable for added convenience. The latch features a brass construction with a 1/2" throw and a steel housing for enhanced security. With a UL listing under BHMA A156.2, Series 4000, Grade 2, and a fire rating of 3 hours, the Arrow MK33-BD-26D-LC not only meets but exceeds safety standards, ensuring peace of mind for any building professional or knowledgeable homeowner.

Grade 2 Asylum Function Knob

Grade 2 Asylum Cylindrical Lock, Ball Knob, Conventional Less Cylinder, Satin Chrome Finish, Non-handed

Arrow MK Series offer the designer, architect and contractor simple solutions to accessibility requirements. Their clean designs, architectural finishes and available functions make them ideal for commercial applications where heavy duty grade one hardware may not be necessary.

The Arrow MK Series has a clear design and is a simple solution to accessibility requirements.

The MK Series is available in several finishes and functions that make them ideal for commercial applications where heavy duty grade one hardware may not be necessary.

• Lock Chassis – Cold rolled steel with zinc dichromate finish for corrosion resistance. Requires standard 2-1/8" (53.97mm) bore through door.
• Backset – 2-3/8" (60.32mm) standard. 2-3/4" (69.85mm), 3-3/4" (95.25mm) and 5" (127mm) available.
• Door Thickness – 1-3/8" (34.92mm) to 1-3/4" (44.45mm). Latch – Brass with 1/2" (12.7mm) throw.
• Latch housing is steel, with zinc dichromate finish for corrosion resistance. 7/8" (22.225mm) bore in edge of door is required.
• Latch Front – Brass, bronze or stainless steel. Standard faceplate for 2-3/8” (60.32.mm) backset measures 2-1/4” (57.15mm) x 1” (25.40mm) with a flat front, for 2-3/4” (69.85mm) backset standard faceplate measures 2-1/4” (57.15mm) x 1-1/8” (28.57mm) with beveled front 1/8” (3.17mm) in 2” (50.8mm). 
• Strike – Brass, bronze or stainless steel. Standard “T” strike measures 2-3/4" (69.85mm) x 1-1/8" (28.57mm). Optional ANSI A115.1 strike measures 4-7/8" (123.82mm) x 1-1/4" (31.75mm). All strikes have a 1-1/4" (31.75mm) lip to center dimension.
• Handing– Reversible.
• Cylinder, Standard – Solid brass 6 pin cylinder with Arrow “A” keyway, keyed to 5 pin for stock. Can be masterkeyed, grandmaster keyed and construction masterkeyed. Conventional cylinders are also available in a variety of competitive manufacturer’s keyways. Supplied with two 5 pin brass keys for stock. Available in Schlage CS keyway and other competitive keyways.

Resources

• MK Series Cut Sheet
• MK Series Dummy Knob Template
• MK Series Grade 2 Cylindrical Knob Locks Cut Sheet
• MK Series Template