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

Arrow MK31-BD-26D Grade 2 Communicating Knob Lock offers a robust solution for commercial applications requiring accessibility and security. This double-cylinder cylindrical lock features a stylish ball knob design and is finished in a sleek satin chrome, ensuring both durability and aesthetic appeal. Designed for non-handed installation, the MK31-BD-26D adapts seamlessly to various door configurations, making it an ideal choice for contractors and architects alike. Constructed with a cold-rolled steel chassis, this lock boasts a zinc dichromate finish for enhanced corrosion resistance. It accommodates standard door thicknesses from 1-3/8" to 1-3/4" and is compatible with backsets of 2-3/8" and 2-3/4". The solid brass 6-pin cylinder, featuring the Arrow "A" keyway, provides reliable security and can be master-keyed for added convenience. With a UL listing for BHMA A156.2, Series 4000, Grade 2, this lock is both functional and compliant with safety standards. The MK Series is available in multiple finishes and functions, catering to diverse commercial needs while maintaining a clean, modern look. Trust in Arrow's legacy of quality craftsmanship for your door hardware needs.

Grade 2 Communicating Knob Loc

Grade 2 Double Cylinder Communicating Cylindrical Lock, Ball Knob, Conventional 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