Arrow MK33 TA 26D Asylum Knob Cylindrical Lock, Ball Knob, Arrow A Keyway, T-Strike, Satin Chrome, Non-handed.


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Arrow MK33 TA 26D Asylum Knob Cylindrical Lock, Ball Knob, Arrow A Keyway, T-Strike, 2-3/4" Backset, Satin Chrome, Non-handed.

MK Series Grade 2 Cylindrical Knob Locks

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 a zinc dichromate finish for corrosion resistance. 7/8" (22.225mm) bore in the edge of the door is required.
  • Latch Front – Brass, bronze or stainless steel. Standard faceplate for 2-3/8” ( 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 pins for stock. Can be master keyed, grandmaster keyed and construction master keyed. 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.
Vendor Assa Abloy
Manufacturer Arrow
Grade Grade 2
Installation Commercial
Origin Mexico
Unit of Measure Each
Base Material Brass, Bronze
UL Listing Type BHMA A156.2, Series 4000, Grade 2, UL Listed
ANSI Number F87
Limited Warranty 1 Year Warranty
Fire Rated 3 Hours {A}
Burglar Rated No
Finish 626/US26D
Finish Description Satin Chrome
Finish Family Matte Silver
Function 33-Asylum
Function Family Institutional
ANSI Function
F87 - Asylum
Lever/Knob Design
TA - Tudor Knob
Lever/Knob Design Family Flat Knob
Rose/Escutcheon Design
2-9/16" Rose Diameter
Rose/Escutcheon Dimensions 2-9/16"
Cylinder Type
Conventional Cylinder
Num Pins 6
Key(s) Cut
Num of Keys 2
Handing Non-handed
Door Thickness 1-3/8" to 1-3/4"
Std. Latch Number 114
Std. Latch Type Deadlatch
Std. Latch Backset Dim 2-3/4"
Latch Bore Diameter 7/8"
Lock Face Size 1-1/8" x 2-1/4"
Bolt Projection 1/2"
Bore Hole Diameter 2-1/8"
Std. Strike Number 300
Std. Strike Type T-Strike
Std. Strike Height 2-3/4"
Std. Strike Width 1-1/8"
Screws Wood/Machine Screws
Product Type Cylindrical Lock

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