Arrow Lock MK31-BD-10B-CS Grade 2 Communicating Knob Loc

Arrow MK31-BD-10B-CS Grade 2 Communicating Knob Lock combines functionality and style, making it an excellent choice for various commercial applications. This Grade 2 double cylinder cylindrical lock features a sleek ball knob design and a durable oil-rubbed bronze finish that ensures both aesthetics and longevity. Designed with accessibility in mind, the MK Series provides a clean, modern look without compromising on security. Constructed from cold-rolled steel with a corrosion-resistant zinc dichromate finish, this lock is built to withstand the rigors of everyday use. It accommodates door thicknesses ranging from 1-3/8" to 1-3/4" and features a standard backset of 2-3/8", with options available up to 5". The solid brass, 6-pin cylinder is compatible with Schlage C keyway, allowing for master keying if needed, and comes with two 5-pin brass keys. The MK31-BD lock's reversible handing, along with its ANSI F80 communicating function, makes it highly versatile. Whether you're an architect, contractor, or a knowledgeable homeowner, this lock provides an elegant yet secure solution for your door hardware needs. With a limited one-year warranty, you can trust in its quality and performance.

Grade 2 Communicating Knob Loc

Grade 2 Double Cylinder Communicating Cylindrical Lock, Ball Knob, Conventional Cylinder Schlage C Keyway, Oil-Rubbed Bronze 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