Arrow Lock MK33-BD-10BE-LC Grade 2 Asylum Function Knob

Arrow MK33-BD-10BE-LC Grade 2 Asylum Function Knob offers a robust solution for commercial door hardware needs without the bulk of Grade 1 products. This cylindrical lock features a stylish ball knob design and a dark oxidized bronze finish that complements various architectural styles while providing essential security. Engineered from cold-rolled steel with a zinc dichromate finish, the lock chassis ensures durability and corrosion resistance, making it suitable for various environments. It requires a standard 2-1/8" bore through the door and accommodates door thicknesses ranging from 1-3/8" to 1-3/4". The versatile design is non-handed and reversible, allowing for easy installation in different configurations. The MK Series is ideal for accessibility requirements, featuring a simple yet elegant profile. The solid brass 6-pin cylinder, keyed to 5 pins for stock, can be masterkeyed or grandmaster keyed, offering flexible security options. With a 1/2" bolt projection and a standard backset of 2-3/8", this lock provides reliable performance while meeting UL and BHMA standards. Perfect for institutional applications, the Arrow MK33-BD-10BE-LC combines functionality with aesthetic appeal, making it an excellent choice for architects, designers, and contractors alike.

Grade 2 Asylum Function Knob

Grade 2 Asylum Cylindrical Lock, Ball Knob, Conventional Less Cylinder, Dark Oxidized 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