Arrow MK33 Asylum Knob Lock - Heavy Duty Door Lock for Security & Privacy - Perfect for Bedrooms, Offices, and Storage Rooms

Arrow MK33 Asylum Knob. Arrow MK Series offer the Security Professional 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.

Arrow MK33 Asylum Knob:

Dead locking latch bolt operated by key in knob from either side.

Both knobs always inoperable.

Features

Lock Chassis: Cold rolled steel with zinc dichromate finish for corrosion resistance. Requires standard 2-1/8" (53.97 mm) bore through door.

Backset: 2-3/8" (60.32 mm) standard. 2-3/4" (69.85 mm), 3-3/4" (95.25 mm) and 5" (127 mm) available.

Door Thickness: 1-3/8" (34.92 mm) to 1-3/4" (44.45 mm)

Latch: Brass with 1/2" (12.7 mm) throw. Latch housing is steel, with zinc dichromate finish for corrosion resistance. 7/8" (22.225 mm) bore in edge of door is required.

Latch Front: Brass or bronze. Standard faceplate for 2-3/8" (60.32 mm) backset measures 2-1/4" (57.15 mm) x 1" (25.40 mm), with a flat front, for 2-3/4" (69.85 mm) standard faceplate measures 2-1/4" (57.15 mm) x 1-1/8" (28.57 mm), with a beveled front 1/8" (3.17 mm) in 2" (50.8 mm).

Strike: Brass, bronze or stainless steel. Standard “T” strike measures 2-3/4" (69.85 mm) x 1-1/8" (28.57 mm). Optional ANSI A115.1 strike measures 4-7/8" (123.82 mm) x 1-1/4" (31.75 mm). All strikes have a 1-1/4" (31.75 mm) 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.

Cylinder Options: Interchangeable Core-lockset prepared for use with 6 or 7 pin interchangeable cores. Supplied less core, but packed with 6 and 7 pin tailpieces. Will accept cores as manufactured by Best,™ Falcon™ and other similar style cores. Suffix “IC” to design.

Finish: US3, US4, US5A, US10, US10B, US26, US26D.

Certification

• ANSI/BHMA A156.2, Series 4000, Grade 2
• Underwriters Laboratories (UL and CUL) listed for use on 3 hour, A label single swinging doors.
• Federal Specifications FF-H-106C, Series 160