Arrow Lock MK31-BD-26D-LC Grade 2 Communicating Knob Loc

Arrow MK31-BD-26D-LC Grade 2 Communicating Knob Lock exemplifies reliable security for commercial applications. This Grade 2 double cylinder cylindrical lock features a sleek ball knob design and a satin chrome finish that complements any architectural style. Its non-handed configuration ensures easy installation, making it a versatile choice for various door thicknesses ranging from 1-3/8" to 1-3/4". Constructed from cold-rolled steel with a zinc dichromate finish, the lock chassis is designed to resist corrosion, ensuring durability over time. The lock requires a standard 2-1/8" bore and has a brass latch with a 1/2" throw, enhancing its security function. The Arrow MK series is tailored to meet accessibility requirements while maintaining a clean, modern aesthetic. The double cylinder design allows for enhanced security, and the solid brass 6 pin cylinder can be masterkeyed for added convenience. With a fire rating of 3 hours, this lock not only meets safety standards but also provides peace of mind. The MK31-BD-26D-LC is an ideal choice for architects, designers, and building professionals seeking reliable and stylish door hardware solutions.

Grade 2 Communicating Knob Loc

Grade 2 Double Cylinder Communicating 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