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

Arrow MK31-BD-10B-LC Grade 2 Communicating Knob Lock offers a reliable solution for commercial applications where high-security requirements are not paramount. This Grade 2 double cylinder lock features a sleek ball knob design, finished in an elegant oil-rubbed bronze that complements various architectural styles. With its non-handed configuration, installation is straightforward, accommodating doors with thicknesses ranging from 1-3/8" to 1-3/4". The lock chassis is constructed from cold-rolled steel with a zinc dichromate finish, ensuring long-lasting durability and corrosion resistance. It requires a standard 2-1/8" bore through the door and comes with a brass latch that boasts a 1/2" throw, providing dependable security. The MK Series also includes a reversible handing feature, making it versatile for various door setups. The lock is supplied with a solid brass 6-pin cylinder, keyed to a 5-pin standard, and allows for master keying options. With a UL listing for safety and fire ratings of up to 3 hours, this lock meets stringent building standards. Whether for new constructions or retrofitting existing doors, the Arrow MK31-BD-10B-LC offers an ideal blend of style, functionality, and security.

Grade 2 Communicating Knob Loc

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